Merge "Initialize mError for AudioCapabilities." into main am: eec973f9c1

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3199233

Change-Id: I72957e8e78c747101e670ec9a2d648aa2a119e4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>