Add template functions and implement setCodecPriority am: 6112bda436 am: 49017418f2

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2836200

Change-Id: I234a71e3049881687b55b2c25244ed4177e7ef91
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>