Replaced the old video player with ExoPlayer

What's improved

• ExoPlayer is now the video player in the SDK.
• The video loading speed is faster.
• The problem of content not displaying intermittently is fixed.
• The issue of playing the video background is fixed.

What's changed

PXLPhotoProductView and PXLPhotoRecyclerView

Play and stop the video

• Option 1: Automatic using androidx.lifecycle.Lifecycle(Jetpack)
  • You just update the SDK the this version, the SDK will work automatically.
• Option 2: Manual (use this if you want to play, stop and release the video when you need)
  • we renamed from playVideo() to playVideoOnResume()
  • we renamed from stopVideo() to stopVideoOnPause()
  • we added playVideoOnStart()
  • we added stopVideoOnStop()

PXLPhotoView

• we removed releaseAllVideos()
• you use pxlPhotoView.playVideo() to play the video
• you use pxlPhotoView.pauseVideo() to pause the video