Add initial support for android adaptive icons. TODO: Add backdrop shadow layer with vectors to adaptive icon

app/src/main/res/drawable-anydpi-v26/launch.xml

@@ -0,0 +1,5 @@
+<adaptive-icon
+    xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@drawable/ic_launcher_background"/>
+  <foreground android:drawable="@drawable/ic_launcher_padded" />
+</adaptive-icon>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportWidth="48.0"
+        android:viewportHeight="48.0">
+        <path
+            android:fillColor="#3F3F3F"
+            android:pathData="M0,0 l 0,-100 100,100 0,0 -100,100z" />
+</vector>

app/src/main/res/drawable/ic_launcher_padded.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<inset xmlns:android="http://schemas.android.com/apk/res/android"
+    android:drawable="@drawable/ic_launcher_foreground"
+    android:insetLeft="20%"
+    android:insetTop="20%"
+    android:insetRight="20%"
+    android:insetBottom="20%" />