alsa_sound: Add support for "Voice Earpiece Extra Gain" mode

Uses "Voice Earpiece Extra Gain" mode instead of "Voice Earpiece" during
voice calls when persist.audio.voc_ep.xgain=1.

Change-Id: I9f00a81687fa9605c68308a74e0ffaaea7e698fc
alsa_sound: Changes for adsp restart handling

ALSA device open does not check for if adsp is up and running
before calling open device. It keeps on looping on device open call
which blocks apps processor to trigger adsp restart during subsystem
restart handling. To avoid this add check adsp state before calling
ALSA device open operation.

Change-Id: I5a637ce0799ec07e5e87af17be1ddb6ab05e49a6

Conflicts:
	alsa_sound/ALSADevice.cpp
	alsa_sound/AudioHardwareALSA.h