Merge "Move HapticSettingObserver to companion object." into rvc-dev am: f6795b10 am: 7d04ec7a am: 8dc6a21d am: 58eda48d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11760917

Change-Id: I7b0621974b7ae713730e1faaaa82cd82b84a3857