[automerger skipped] Merge "Allow getSystemSelectionChannels to return specifiers" am: c3325707a5 am: 3e8439d5ec am: 6a0a1a18d5 -s ours

am skip reason: Change-Id I574e897c0fdb57cad1a3655c34d43f0d080de9ae with SHA-1 bb4c2fdc02 is in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1595753

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5a4e9d0f4761ee7bc31abbdaaf8e97b8cd845077