[Android] Make Stopping foreground service optional when app losses audio focus

[amrfarid140]

Description

As it stands, if you set MusicControl.handleAudioInterruptions(true); this means the android app is listening on audio focus changes.

When the app losses focus, the listener calls emitter.onStop which ends up stopping the foreground service.

However, not all apps want that. For example, you might want to pause the audio instead of killing the playback altogether.

I am happy to submit a PR for this just opening the issue to take opinions on

1. Will this change be accepted?
2. How it should look like?

2. Platform ?

   • iOS
   • Android

3. Device

• Simulator
• Real device