Merge "Add details to VibrationEffect waveform documentation" into rvc-dev am: 19dd14d7 am: bdac8459 am: 8a478317

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

Change-Id: I9e81f57e4bf5f83b37bea49820ea670609a4c1e4