feat(android): adaptive icons in default template (#14052)

Author: m1ga

templates/app/default/template/platform/android/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?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"/>
+  <monochrome android:drawable="@mipmap/ic_launcher_monochrome"/>
+</adaptive-icon>

templates/app/default/template/platform/android/res/mipmap-hdpi/ic_launcher.png

@@ -42,6 +42,7 @@
 	</ios>
 	<android xmlns:android="http://schemas.android.com/apk/res/android">
 		<manifest android:versionCode="1">
+			<application android:icon="@mipmap/ic_launcher" />
 		</manifest>
 	</android>
 	<modules>