Merge "Allow getSystemSelectionChannels to return specifiers" am: c3325707a5 am: 3e8439d5ec

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Idcf32fd1c720c3f08ecfc3fe16582ca9f121fa33