Include what is needed

Remove old includes.
Header files only include other header files that they directly need themselves.

Change-Id: Ic471386808d9f42ea19ccbd59cb50a5f83a89dd0
diff --git a/services/audioflinger/AudioPolicyService.cpp b/services/audioflinger/AudioPolicyService.cpp
index fd4431c..eacecf0 100644
--- a/services/audioflinger/AudioPolicyService.cpp
+++ b/services/audioflinger/AudioPolicyService.cpp
@@ -40,6 +40,7 @@
 #include <system/audio_policy.h>
 #include <hardware/audio_policy.h>
 #include <audio_effects/audio_effects_conf.h>
+#include <media/AudioParameter.h>
 
 namespace android {