m7: Enable I2SPCM slave mode for SCO

 * New mode in Bluedroid to configure firmware
 * Add ACDBID for proxy device which previously could have caused
   calibration issues.
 * Fixes Bluetooth call audio!

Change-Id: I0db5931c1ebac36ede8f4bd22e20c52673912902
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2