Font Colors and Separate Themes

Once applied this commit will change the font colors according to the
design and move all themes into a dedicated file.

Closes #333

briar-android/res/layout/forum_discussion_cell.xml

@@ -82,6 +82,7 @@
 			android:layout_marginTop="@dimen/margin_medium"
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
+			android:textColor="@color/briar_text_primary"
 			tools:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."/>
 
 		<de.hdodenhof.circleimageview.CircleImageView

briar-android/res/layout/introduction_message.xml

@@ -73,6 +73,7 @@
 			android:layout_weight="1"
 			android:gravity="top"
 			android:textSize="@dimen/text_size_medium"
+			android:textColor="@color/briar_text_primary"
 			tools:text="@string/introduction_message_text"/>
 
 		<EditText

briar-android/res/layout/invitation_bluetooth_confirmation_code.xml

@@ -47,6 +47,7 @@
 			android:layout_height="wrap_content"
 			android:padding="@dimen/margin_medium"
 			android:textSize="50sp"
+			android:textColor="@color/briar_text_secondary"
 			android:layout_below="@+id/yourConfirmationCodeView"
 			android:layout_centerHorizontal="true"
 			tools:text="1337"/>

briar-android/res/layout/invitation_bluetooth_invitation_code.xml

@@ -33,6 +33,7 @@
 			android:layout_height="wrap_content"
 			android:layout_marginTop="@dimen/margin_medium"
 			android:textSize="50sp"
+			android:textColor="@color/briar_text_secondary"
 			android:layout_below="@+id/yourCodeView"
 			android:layout_centerHorizontal="true"
 			tools:text="1337"/>

briar-android/res/layout/invitation_error.xml

@@ -16,6 +16,7 @@
 		android:text="@string/connection_failed"
 		android:layout_gravity="center_horizontal"
 		android:textSize="@dimen/text_size_large"
+		android:textColor="@color/briar_text_primary"
 		android:drawableStart="@drawable/alerts_and_states_error"
 		android:drawableLeft="@drawable/alerts_and_states_error"
 		android:gravity="center_vertical"
@@ -26,6 +27,7 @@
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 		android:text="@string/interfering"
+		android:textColor="@color/briar_text_primary"
 		android:layout_gravity="center_horizontal"
 		android:padding="@dimen/margin_medium"/>
 

briar-android/res/layout/list_item_contact.xml

@@ -65,7 +65,7 @@
 				android:layout_width="wrap_content"
 				android:layout_height="wrap_content"
 				android:maxLines="2"
-				android:textColor="@android:color/primary_text_light"
+				android:textColor="@color/briar_text_primary"
 				android:textSize="@dimen/text_size_medium"
 				tools:text="This is a name of a contact"/>
 
@@ -73,7 +73,7 @@
 				android:id="@+id/dateView"
 				android:layout_width="wrap_content"
 				android:layout_height="wrap_content"
-				android:textColor="@android:color/secondary_text_light"
+				android:textColor="@color/briar_text_secondary"
 				android:textSize="@dimen/text_size_small"
 				tools:text="Dec 24"/>
 

briar-android/res/layout/list_item_crash.xml

@@ -19,9 +19,11 @@
 		<TextView
 			android:id="@+id/title"
 			android:layout_width="wrap_content"
-			android:layout_height="wrap_content"
+			android:layout_height="match_parent"
 			android:layout_marginBottom="@dimen/margin_small"
+			android:gravity="bottom"
 			android:textSize="@dimen/text_size_large"
+			android:textColor="@color/briar_text_primary"
 			tools:text="Crash log entry title"/>
 	</LinearLayout>
 
@@ -30,6 +32,7 @@
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 		android:layout_marginBottom="@dimen/margin_medium"
+		android:textColor="@color/briar_text_secondary"
 		tools:text="Crash log entry value"/>
 
 </LinearLayout>

briar-android/res/layout/list_item_forum_invitation_in.xml

@@ -27,6 +27,7 @@
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
 			android:textStyle="italic"
+			android:textColor="@color/briar_text_secondary"
 			tools:text="@string/forum_invitation_received"/>
 
 		<TextView

briar-android/res/layout/list_item_forum_invitation_out.xml

@@ -26,6 +26,7 @@
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
 			android:textStyle="italic"
+			android:textColor="@color/briar_text_secondary"
 			tools:text="@string/introduction_request_received"/>
 
 		<TextView

briar-android/res/layout/list_item_introduction_in.xml

@@ -27,6 +27,7 @@
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
 			android:textStyle="italic"
+			android:textColor="@color/briar_text_secondary"
 			tools:text="@string/introduction_request_received"/>
 
 		<TextView

briar-android/res/layout/list_item_introduction_out.xml

@@ -26,6 +26,7 @@
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
 			android:textStyle="italic"
+			android:textColor="@color/briar_text_secondary"
 			tools:text="@string/introduction_request_received"/>
 
 		<TextView

briar-android/res/layout/list_item_msg_in.xml

@@ -16,6 +16,7 @@
 		android:layout_height="wrap_content"
 		android:textIsSelectable="true"
 		android:textSize="@dimen/text_size_medium"
+		android:textColor="@color/briar_text_primary"
 		tools:text="Short message"/>
 
 	<TextView

briar-android/res/layout/list_item_notice_in.xml

@@ -17,6 +17,7 @@
 		android:textIsSelectable="true"
 		android:textSize="@dimen/text_size_medium"
 		android:textStyle="italic"
+		android:textColor="@color/briar_text_secondary"
 		tools:text="@string/introduction_response_accepted_received"/>
 
 	<TextView

briar-android/res/layout/list_item_notice_out.xml

@@ -22,6 +22,7 @@
 			android:textIsSelectable="true"
 			android:textSize="@dimen/text_size_medium"
 			android:textStyle="italic"
+			android:textColor="@color/briar_text_secondary"
 			tools:text="@string/introduction_response_accepted_sent"/>
 
 		<TextView

briar-android/res/layout/list_item_selectable_contact.xml

@@ -37,6 +37,7 @@
 			android:layout_toRightOf="@+id/avatarView"
 			android:maxLines="2"
 			android:textSize="@dimen/text_size_large"
+			android:textColor="@color/briar_text_primary"
 			tools:text="This is a name of a contact"/>
 
 		<CheckBox

briar-android/res/layout/list_item_transport.xml

@@ -20,7 +20,7 @@
 		android:layout_width="wrap_content"
 		android:layout_height="match_parent"
 		android:padding="@dimen/margin_small"
-		android:textColor="@android:color/tertiary_text_light"
+		android:textColor="@color/briar_text_secondary"
 		tools:text="@string/transport_tor"/>
 
 </LinearLayout>

briar-android/res/layout/share_forum_message.xml

@@ -19,6 +19,7 @@
 			android:layout_weight="1"
 			android:gravity="top"
 			android:textSize="@dimen/text_size_medium"
+			android:textColor="@color/briar_text_primary"
 			android:text="@string/forum_share_message"/>
 
 		<EditText