Merge "Allow getSystemSelectionChannels to return specifiers" into sc-dev am: 197231f6f9

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/13562278

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I7ffc380d69654aefba13a1dfc148bd440a7bf532