Merge "Clarify the ComposerClient comment for CONFIG_GROUP" am: f344363e64 am: 281a5870d0 am: ae48e3ae6f

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1497983

Change-Id: I71bc6d2b79dc82d8a8fb12a01244ccd244e8d194