[Android] AdsManager.destroy() doesn't call VideoAdPlayer.release()

[Alex]

We recently updated from IMA SDK 3.36.0 to 3.38.0 and it introduced a regression:

When AdsManager.destroy() is called by an application, VideoAdPlayer.release() is not called by the SDK anymore. This can cause an ad to play in background when application expects that SDK will abort the ad when it calls AdsManager.destroy() (e.g. when navigating back to the previous screen).