HDMI: Notify AVB mute atfer adjust volume

Tv might mistakenly send mute command to AVR when re-enabling AVB
because notification might be sent early. As
such, we should wait for device volume behavior before calling
notifyAvbMuteChange.

Bug: b/410498620
Test: atest TvToAudioSystemArcAvbTest and atest TvToAudioSystemEarcAvbTest
Flag: EXEMPT Bugfix only
Change-Id: I5936ff082f9b3e138f759d1f35fe112c8e69153f