Merge "CCodecBufferChannel: do not clear tracked frames at flush" into udc-dev am: 4129c644

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/23040499



Change-Id: Ie40a07e483a021c903fe1be0824455d2e7fcaa8a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>