Add datasets/android/

Based on https://www.hanshq.net/command-line-android.html.

See [Benjamin-Loison/android/issues/30](https://github.com/Benjamin-Loison/android/issues/30).

datasets/android/res/layout/activity_main.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/my_text"/>
+</LinearLayout>
+