Add launcher icon

mastodon/src/main/AndroidManifest.xml

@@ -10,6 +10,8 @@
 		android:allowBackup="true"
 		android:label="@string/app_name"
 		android:supportsRtl="true"
+		android:icon="@mipmap/ic_launcher"
+		android:roundIcon="@mipmap/ic_launcher_round"
 		android:theme="@style/Theme.Mastodon.AutoLightDark"
 		android:largeHeap="true">
 

mastodon/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="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

mastodon/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="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>