[automerger skipped] AudioFlinger: Extract inner Thread classes am: 71742ab381 am: dd2bff23ed -s ours am: 4856e9082a -s ours

am skip reason: Merged-In I642498760a50a5b55751f090627f75ad5adb5468 with SHA-1 c07c863a09 is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2778274

Change-Id: Ib31737c0e74aacd82597285911e29f733481eb84
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>