fix(android): remove pausePlayback when audio focus loss event

[YangJonghun]

Update the documentation

fix(android): remove pausePlayback when audio focus loss event

Update the changelog

fix(android): remove pausePlayback when audio focus loss event

Describe the changes

pausePlayback is added within PR #1897 (commit 1ab82f7)
but, it makes unintended pauses can be happen with below flow
source ready(auto play) -> pause -> play

[freeboub]

I agree with that, this behavior is an application choice !

[freeboub]

@KrzysztofMoch @YangJonghun I think again of this patch, I think it will cause some regressions ...
What would be the behaviour when user receive an incoming call ?
Users will have to patch their application to restaure this default behavior...
Do you agree to revert it ?
Ideally we should make this behavior configurable by application with a new prop !

[YangJonghun]

@freeboub
Your suggestion is very good.
but usually, we have to pause with AUDIOFOCUS_LOSS event. the problem is developer doesn't have any chance to resume their playback.
I think simple revert would continue the problem, so I was wondering about adding the below code to the AUDIOFOCUS_GAIN event handler.

            switch (focusChange) {
                case AudioManager.AUDIOFOCUS_LOSS:
                    view.hasAudioFocus = false;
                    view.eventEmitter.audioFocusChanged(false);
                    view.pausePlayback();
                    view.audioManager.abandonAudioFocus(this);
                    break;
                case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
                    view.eventEmitter.audioFocusChanged(false);
                    break;
                case AudioManager.AUDIOFOCUS_GAIN:
                    view.hasAudioFocus = true;
                    view.eventEmitter.audioFocusChanged(true);
                    if (!view.isPaused) {
                        view.startPlayback();
                    }
                    break;
                default:
                    break;
            }

[freeboub]

@YangJonghun Ok, I understand correctly the request know!
You are right, in case the playback has been paused due to audioFocusLoss, we should resume it (but only in that precise case!)
I will revert the change for now.
Ideally, this behavior shall be configurable by application...