Add:

- android & ios prebuild

### No Issue

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

@@ -0,0 +1,6 @@
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:drawable="@color/splashscreen_background"/>
+  <item>
+    <bitmap android:gravity="center" android:src="@drawable/splashscreen_logo"/>
+  </item>
+</layer-list>