C2BqBuffer: Clear a cached buffer if reallocation is needed am: bae7e457

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/20000287



Change-Id: Ia7757a0574d1d2054e216f5f35b2021c6c909b76
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>