IntentService from another Application

I would be very grateful if you help me to understand where I made a mistake in the code.
I have two applications.
App1 has activity with buttons which start and stop the service from App2.
App2 has no activity. It has only Java class with Service.
I will be very thankful for any comments and answers.

Thanks!

App1 (Activity):

public class MainActivity extends AppCompatActivity {

Intent intent;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    intent = new Intent("com.example.timbook.myservice.MService");
}

public void onClickStart (View v) {
    startService(intent);
}

public void onClickStop (View v) {
    stopService(intent);
}
}

App1 (Manifest):

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

App2 (Service):

public class MService extends Service{

MediaPlayer mp;

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onCreate() {
    super.onCreate();
    mp = MediaPlayer.create(this,R.raw.glassanimals);
    mp.start();
}
}

App2 (Manifest):

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <service
        android:name="com.example.timbook.myservice.MService"
        android:enabled="true"
        android:exported="true">
        <intent-filter>
            <action android:name="com.example.timbook.myservice.MService"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>

    </service>

</application>