Adding UNPROCESSED to the available audio_sources

bug: 25564291
Change-Id: I86d8feda4d687352f98b640819211207a06d6b50
diff --git a/services/audiopolicy/service/AudioPolicyEffects.cpp b/services/audiopolicy/service/AudioPolicyEffects.cpp
index 282ddeb..f6f8276 100644
--- a/services/audiopolicy/service/AudioPolicyEffects.cpp
+++ b/services/audiopolicy/service/AudioPolicyEffects.cpp
@@ -323,7 +323,8 @@
     VOICE_CALL_SRC_TAG,
     CAMCORDER_SRC_TAG,
     VOICE_REC_SRC_TAG,
-    VOICE_COMM_SRC_TAG
+    VOICE_COMM_SRC_TAG,
+    UNPROCESSED_SRC_TAG
 };
 
 // returns the audio_source_t enum corresponding to the input source name or