Merge "vibrator: example for how to get ID" am: 6eaf0cf502 am: 5aac849a64 am: 84a090bc8b

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1513139

Change-Id: I3a5fe7e3ad50ec74f25331efa2a520ee6e871a60