Merge "AudioFlinger: fix fast capture silence" into rvc-dev am: 044eaa62 am: 71f517e7 am: 2b32fa03

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11671291

Change-Id: I0848c171f7c7821f689e33e0d6bb7a2d2bd4fd83