Merge "audio: change volume only if effect updates the volume" into main am:...

Merge "audio: change volume only if effect updates the volume" into main am: 371e1ae4 am: a09957e8 am: 7b7d54e7

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2720894



Change-Id: Ib723ab726c1a6c2fa3dd4dddc3c6bd64b25c7eb5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>