Merge "Use RepeatableExecutor to poll playback position" into rvc-dev am: ed336611 am: b9dd8798 am: 1794de4a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11663599

Change-Id: Ic4fe93a6d58752fb039e6fb2c8c9cdf7c8433819