Address review comments

briar-android/src/org/briarproject/android/threaded/BaseThreadItemViewHolder.java

@@ -21,13 +21,13 @@ import org.briarproject.util.StringUtils;
 
 @UiThread
 @NotNullByDefault
-public class BaseThreadItemViewHolder<I extends ThreadItem>
+public abstract class BaseThreadItemViewHolder<I extends ThreadItem>
 		extends RecyclerView.ViewHolder {
 
 	private final static int ANIMATION_DURATION = 5000;
 
+	protected final TextView textView;
 	private final ViewGroup layout;
-	private final TextView textView;
 	private final AuthorView author;
 	private final View topDivider;
 

briar-android/src/org/briarproject/android/threaded/ThreadItem.java

@@ -1,7 +1,5 @@
 package org.briarproject.android.threaded;
 
-import android.support.annotation.UiThread;
-
 import org.briarproject.api.clients.MessageTree.MessageNode;
 import org.briarproject.api.identity.Author;
 import org.briarproject.api.identity.Author.Status;
@@ -11,7 +9,6 @@ import javax.annotation.concurrent.NotThreadSafe;
 
 import static org.briarproject.android.threaded.ThreadItemAdapter.UNDEFINED;
 
-@UiThread
 @NotThreadSafe
 public abstract class ThreadItem implements MessageNode {
 
@@ -97,4 +94,5 @@ public abstract class ThreadItem implements MessageNode {
 	public void setDescendantCount(int descendantCount) {
 		this.descendantCount = descendantCount;
 	}
+
 }

briar-android/src/org/briarproject/android/threaded/ThreadItemAdapter.java

@@ -316,7 +316,7 @@ public class ThreadItemAdapter<I extends ThreadItem>
 		revision++;
 	}
 
-	protected interface ThreadItemListener<I> {
+	public interface ThreadItemListener<I> {
 
 		void onItemVisible(I item);
 

briar-android/src/org/briarproject/android/threaded/ThreadListController.java

@@ -1,6 +1,5 @@
 package org.briarproject.android.threaded;
 
-import android.content.Context;
 import android.support.annotation.Nullable;
 import android.support.annotation.UiThread;
 
@@ -40,8 +39,6 @@ public interface ThreadListController<G extends NamedGroup, I extends ThreadItem
 
 		@UiThread
 		void onGroupRemoved();
-
-		Context getApplicationContext();
 	}
 
 }

briar-android/src/org/briarproject/android/threaded/ThreadListControllerImpl.java

@@ -42,7 +42,6 @@ public abstract class ThreadListControllerImpl<G extends NamedGroup, I extends T
 			Logger.getLogger(ThreadListControllerImpl.class.getName());
 
 	protected final IdentityManager identityManager;
-	@CryptoExecutor
 	protected final Executor cryptoExecutor;
 	protected final AndroidNotificationManager notificationManager;
 	protected final Clock clock;