Merge "Move bufferpool and bqhelper into mainline-specific directories" am: b8194a6b

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2209917



Change-Id: Ia2d5a9c45748efc77e7fede977d0ea0b63336c28
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>