hammerhead: add Right channel path and changes gain for TTY
hammerhead: add Right channel path and changes gain for TTY

Device need to add Right Channel(RX2, HPHR) for working SO73 TTY test.
Otherwise device send broken tty data to other device

Bug: 11000747

Change-Id: Id4e6d7605b3a522587b7f4231bffab8fcc133378

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