Rename type() to streamType()

This avoids possible confusion with thread's type().
Also remove redundant cast "(audio_stream_type_t)".

Change-Id: I320b9177b6c267a102d215f002228bcf988c437a
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 97103c4..4f7f195 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -600,7 +600,7 @@
                         return mName;
                     }
 
-                    audio_stream_type_t type() const {
+                    audio_stream_type_t streamType() const {
                         return mStreamType;
                     }
                     status_t    attachAuxEffect(int EffectId);