Adding UNPROCESSED to the available audio_sources

bug: 25564291
Change-Id: I86d8feda4d687352f98b640819211207a06d6b50
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index a66be09..b0df018 100755
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -662,6 +662,7 @@
         break;
 
     case AUDIO_SOURCE_VOICE_RECOGNITION:
+    case AUDIO_SOURCE_UNPROCESSED:
     case AUDIO_SOURCE_HOTWORD:
         if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
                 availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {