implementing concurrent codec metrics am: 1f002cf0

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2461579



Change-Id: I0fea5c219d300b3c301fd80b0f408795c08ae41f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>