hammerhead: change the voice gain for speaker and headphones
hammerhead: change the voice gain for speaker and headphones

-Increase speaker gain to 10dB form 0dB
-Decrease speaker mic gain to 21dB from 24dB
-Increase headphone gain to 0dB

Change-Id: I5e3a3d61f392c837e0627a4c125f5e6673a54371

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead