add support for building app on android.

packaging/android/res/drawable/splash_logo.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle" >
+            <solid android:color="#FF1fca05"/>
+        </shape>
+    </item>
+    <item android:width="256dp" android:height="256dp" android:gravity="center" android:drawable="
+          @drawable/logo">
+    </item>
+</layer-list>