[automerger skipped] Merge "OMX VTS: free graphics buffers at the end of test"...

[automerger skipped] Merge "OMX VTS: free graphics buffers at the end of test" into android11-tests-dev am: 9f5c3c27 -s ours

am skip reason: Merged-In Ib9660ef8967b34114b36d71f9ed424f819b57e7a with SHA-1 179a52cb is already in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1581304

Change-Id: Ic37406f5d67dfd196c97affdb1627d01cf9918ed