Put play state information in the sticky broadcast again.

For backwards compatibility to 3rd party apps.

Change-Id: I607cd197b3e6d0d3f9c6961cf150f1f91d028c91
Send com.android.music prefixed sticky broadcasts

For the sake of backwards compatibility. See issue 5803.

(cherry picked from commit a22c64e786d7819b28897028c73fbfae1e8fea80)

Change-Id: Icdd29fc783e420ac836b1e4677d8d3decbb6c360