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/AndroidManifest.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="net.hanshq.hello"
+          versionCode="1"
+          versionName="0.1">
+    <uses-sdk android:minSdkVersion="33"/>
+    <application android:label="Hello">
+        <activity android:name=".MainActivity" android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

datasets/android/java/net/hanshq/hello/MainActivity.java

@@ -0,0 +1,20 @@
+package net.hanshq.hello;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.TextView;
+import android.content.Context;
+import android.os.BatteryManager;
+
+public class MainActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        TextView text = (TextView)findViewById(R.id.my_text);
+		Context context = getApplicationContext();
+		BatteryManager batteryManager = (BatteryManager)context.getSystemService(Context.BATTERY_SERVICE);
+        text.setText("Hello, worldeee!" + batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CHARGE_COUNTER));
+    }
+}

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>
+