add support for building app on android.

packaging/android/res/drawable/logo.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="400.174dp"
+    android:height="400.174dp"
+    android:viewportWidth="400.174"
+    android:viewportHeight="400.174">
+
+    <path
+        android:fillColor="#45B549"
+        android:pathData="M201.38,88.422c113.12-12.44,149.88-84,150-84c1.856-3.567,6.252-4.953,9.819-3.097 c1.799,0.936,3.126,2.581,3.661,4.537c37.6,127.52,17.08,215.44-26.08,267.6c-16.709,20.331-38.11,36.296-62.36,46.52 c-22.339,9.474-46.587,13.584-70.8,12c-46.36-3.24-88.68-28-108.32-72.36c-5.032-11.34-8.284-23.388-9.64-35.72 c-2.743-24.717,2.083-49.685,13.84-71.6c12.622-23.385,32.719-41.863,57.08-52.48C172.173,93.833,186.611,89.988,201.38,88.422 L201.38,88.422z" />
+    <path
+        android:fillColor="#009549"
+        android:pathData="M350.58,7.102c0.099-4.019,3.437-7.198,7.456-7.099c4.019,0.099,7.198,3.437,7.099,7.456 c-0.007,0.296-0.033,0.59-0.076,0.883c0,0.36-6.36,84-88,168.64l-0.76,0.8c-19.18,19.673-40.226,37.436-62.84,53.04l49.04,9.12 c3.909,0.943,6.313,4.876,5.37,8.784c-0.854,3.538-4.189,5.902-7.81,5.536l-64-12c-58.36,36.96-157.28,71.08-165.92,151.6 c-0.535,3.985-4.199,6.782-8.184,6.247c-3.793-0.509-6.544-3.868-6.296-7.687c10.32-96.52,108.4-121.36,174.56-163.56l0.92-0.6 c26.403-16.71,50.861-36.311,72.92-58.44l-5.8-57.4c-0.535-3.985,2.262-7.649,6.247-8.184s7.649,2.262,8.184,6.247 c0.022,0.165,0.039,0.331,0.049,0.497l4.4,44.56C345.18,79.142,350.54,7.422,350.58,7.102L350.58,7.102z" />
+</vector>

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>

packaging/android/res/values/apptheme.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppTheme" parent="@android:style/Theme.DeviceDefault.Light.NoActionBar">
+        <item name="android:windowBackground">@drawable/splash_logo</item>
+    </style>
+</resources>