audio: fix VOIP

Adding AUDIO_FEATURE_DISABLED_MULTI_VOICE_SESSIONS := true
disables adding COMPRESS_VOIP_ENABLED which is needed
for any VOIP usage

Needs https://gerrit.omnirom.org/#/c/8997/

Change-Id: I916bfc950c077427577286ec44a4173c7d449737
Merge "audio: fix VOIP" into android-4.4