Revert "RingtonePicker: use a non-intercepted stream for playback."

This reverts commit c50b2befee37f28f9b482b0a31a62329142e4a6a.

When user set alarm ringtone in DeskClock,
It can't play with AudioManager.STREAM_SYSTEM stream type

Bug: 16906307
Change-Id: Ia0d8df9b5c31441d34dc82678bceccd8ce31423d
1 file changed