Feature:
- [Android/IOS] Add CSAI using google IMA (need to be enable in gradle for android)
- [Android] add new events on tracks changed
Bugfix:
- [IOS] avoid controls to be displayed when disabled
- [IOS] ensure audio and subtitle tracks are well reported
- [IOS] improve logs
- [IOS] Fix crash in presentFullScreenPlayer
- [ìOS] Fix crash when changing source rapidly
- [Android/IOS] sample improvement
- [Android] fix progress report which doesn't respect configured timing
- [Android] Fix crash due to null activity
- [DOC] various improvements