Add play/pause button when state has ACTION_PLAY_PAUSE

Previously the check only worked if the state included either
ACTION_PLAY or ACTION_PAUSE, but apps can declare ACTION_PLAY_PAUSE to
indicate that they support both commands. So, also check for that when trying
to create a play/pause button.

Fixes: 228521620
Test: manual; atest MediaDataManagerTest
Change-Id: Ia5715e17df9cf55ac19ab533736474c12fc092f6