Merge branch 'adaptive-icon' into 'master'

Add adaptive icon for API 26+ and Play Store icon

Closes #1456

See merge request briar/briar!1293

briar-android/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,43 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <group android:scaleX="0.20807062"
+      android:scaleY="0.20807062"
+      android:translateX="19.73077"
+      android:translateY="19.73077">
+    <path
+        android:pathData="M94,144.5V264c0,9.7 7.9,17.7 17.7,17.7h8.3c9.7,0 17.7,-8 17.7,-17.7V144.5Z"
+        android:fillColor="#87c214"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M137.7,86.8V64.3c0,-9.7 -8,-17.7 -17.7,-17.7h-8.3C102,46.6 94,54.6 94,64.3v22.5z"
+        android:fillColor="#87c214"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M234.7,183.8V64.3c0,-9.7 -7.9,-17.7 -17.7,-17.7h-8.3c-9.7,0 -17.7,8 -17.7,17.7v119.5z"
+        android:fillColor="#87c214"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M191,241.5V264c0,9.7 8,17.7 17.7,17.7h8.3c9.7,0 17.7,-8 17.7,-17.7v-22.5z"
+        android:fillColor="#87c214"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M87,190.8H64.5c-9.7,0 -17.7,7.9 -17.7,17.7v8.3c0,9.7 7.9,17.7 17.7,17.7H87Z"
+        android:fillColor="#95d220"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M264.2,190.8H144.7v43.7h119.5c9.7,0 17.7,-8 17.7,-17.7v-8.3c-0.1,-9.7 -8,-17.7 -17.7,-17.7z"
+        android:fillColor="#95d220"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="M184,93.8H64.5c-9.7,0 -17.7,7.9 -17.7,17.7v8.3c0,9.7 7.9,17.7 17.7,17.7H184Z"
+        android:fillColor="#95d220"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="m264.2,93.8h-22.5v43.7h22.5c9.7,0 17.7,-7.9 17.7,-17.7v-8.3c-0.1,-9.7 -8,-17.7 -17.7,-17.7z"
+        android:fillColor="#95d220"
+        android:strokeColor="#00000000"/>
+  </group>
+</vector>

briar-android/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

briar-android/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

briar-android/src/main/res/values/ic_launcher_background.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#FFFFFF</color>
+</resources>