Add frozen field to vibrator am: 68c5898e

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3270772



Change-Id: I6812a4424967cfa19279d3dfc8d9edb7822a35bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>