Move the increase of volume to the main thread
Move the increase of volume to the main thread

When the thread calling playWithFade finishes, any timers scheduled
with performSelector:withObject:afterDelay would be dropped.

generalus89/cordova-plugin-nativeaudio,generalus89/cordova-plugin-nativeaudio,SidneyS/cordova-plugin-nativeaudio,generalus89/cordova-plugin-nativeaudio,SidneyS/cordova-plugin-nativeaudio,SidneyS/cordova-plugin-nativeaudio