Fix to check the incoming userid argument for RingtonePlayer

In PowerNotificationWarnings, where it dispatches notifications
with UserHandle.ALL:
    mNoMan.notifyAsUser(TAG_NOTIFICATION, R.id.notification_power, n, UserHandle.ALL);
The fix is to have RingtonePlayer check the incoming userId argument to playAsync(),
and change USER_ALL to USER_OWNER.

BUG=22516181
BUG=22992637
Change-Id: Ia3f8aaa2bee7fb15c24542e2331b2bc5a877e715