tree f87390cb2fbe94c6231469e86aca5a693e7b716a
parent f0e74ae8ac115f415ec1e3f104ea688c55a4dddb
author Jaewan Kim <jaewan@google.com> 1522894418 +0900
committer Jaewan Kim <jaewan@google.com> 1522894418 +0900

MediaController: Fix annotation of Callback#onPlaybackStateChanged()

PlaybackState can be null and it's annotated as @Nullable in other
places. So we'd better to fix the annotation.

Bug: 77532207
Test: Run CtsMediaTestCases
Change-Id: I8974c6c99d9d188934f74775977631fb7b37e5d2