[automerger skipped] codec2: add filter plugin interface & wrapper...

[automerger skipped] codec2: add filter plugin interface & wrapper implementation am: e539843f am: 6a420fdc am: 112f99ca -s ours am: 5ea69301 -s ours

am skip reason: Change-Id I9e96695101262ecf0e8428574ecc56c0c6e17ae7 with SHA-1 09a62c6b is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1595310

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6136536acb1262d8c4587ca87ea26b74b5cacb8b