Merge "Declare license metadata for copied files." am: a579586b20 am: a59b72a2bd am: 6d89fc2dc7

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1984468

Change-Id: Ib24f143cfad36e51e1c9d658b0066cfa310ccd6d