Use valueAt instead of editValueAt when possible

Change-Id: I885b169f4b176a6b5c2ca9a534214b4ffff1700e
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 5190ab1..43c55a6 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -615,7 +615,7 @@
                     void        releaseWakeLock_l();
                     void setEffectSuspended_l(const effect_uuid_t *type,
                                               bool suspend,
-                                              int sessionId = AUDIO_SESSION_OUTPUT_MIX);
+                                              int sessionId);
                     // updated mSuspendedSessions when an effect suspended or restored
                     void        updateSuspendedSessions_l(const effect_uuid_t *type,
                                                           bool suspend,