Fix audio for VoLTE calls.

Bug: 17785543
Change-Id: I4012a63867de4a39675f2b624c2ec05ece3a05bd
diff --git a/device.mk b/device.mk
index 7f4e1d8..1f30ca6 100644
--- a/device.mk
+++ b/device.mk
@@ -299,7 +299,7 @@
 endif
 
 # Enable for volte call
-AUDIO_FEATURE_ENABLED_MULTI_VOICE_SESSIONS := false
+AUDIO_FEATURE_ENABLED_MULTI_VOICE_SESSIONS := true
 
 PRODUCT_PROPERTY_OVERRIDES += \
    ro.hwui.texture_cache_size=72 \