Merge "Add details to VibrationEffect waveform documentation" into rvc-dev am: 19dd14d7 am: 76b6eb1e am: 3e69bb43 am: 4eeb5328

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11837599

Change-Id: I4b118683d22bef1eff89be166cf09ca06ed67a01