Add template functions and implement setCodecPriority am: 6112bda436 am: 49017418f2 am: ab870cc6af

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

Change-Id: I54223bc23dab8a02b52afd6f18702a25eaaf9141
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>