Audioservice: fix A2dp support on Samsung's Audio Policy HAL.

Samsung's audio policy HAL doesn't handle A2DP delay commands
correctly which was merged in JB.
Adds a nodelaya2dp config option.

http://review.cyanogenmod.org/#/c/30595/

Change-Id: I188c6e59fdf1b30bef41d8e1aa84ac5319f3bcc3
Signed-off-by: DHO <DHO@dho.im>