Bug 1645668 - part1 : reset audible state when aborting current load. r=bryce

When aborting the current load, media element is undoubtedly inaudible. Therefore, we should reset its audible state in order to keep the audible state correct. That can help us show the sound indicator on the tab bar correctly.

Differential Revision: https://phabricator.services.mozilla.com/D81631

dom/html/HTMLMediaElement.cpp

@@ -2245,6 +2245,7 @@ void HTMLMediaElement::AbortExistingLoads() {
   mWaitingForKey = NOT_WAITING_FOR_KEY;
   mSourcePointer = nullptr;
   mIsBlessed = false;
+  SetAudibleState(false);
 
   mTags = nullptr;
   mAudioTrackSilenceStartedTime = 0.0;