Add microG icon

        <!-- This is the longest AndroidManifest.xml ever. -->

        <activity android:name="Settings$MicroGActivity"

            android:label="@string/micro_g">

            android:label="@string/micro_g"

            android:icon="@drawable/ic_microg_settings">

            <intent-filter android:priority="1">

                <action android:name="android.settings.MICROG_SETTINGS" />

                <category android:name="android.intent.category.DEFAULT" />