Remove dependencies on hardware/audio_policy.h

Most of the time it's not needed, may be needed when
USE_LEGACY_AUDIO_POLICY is enabled.

Test: make

Change-Id: Id25eafc05352f07614965913d367d484f2673fbd
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index def6405..f34473c 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -26,12 +26,12 @@
 #include <binder/BinderService.h>
 #include <system/audio.h>
 #include <system/audio_policy.h>
-#include <hardware/audio_policy.h>
 #include <media/IAudioPolicyService.h>
 #include <media/ToneGenerator.h>
 #include <media/AudioEffect.h>
 #include <media/AudioPolicy.h>
 #ifdef USE_LEGACY_AUDIO_POLICY
+#include <hardware/audio_policy.h>
 #include <hardware_legacy/AudioPolicyInterface.h>
 #endif
 #include "AudioPolicyEffects.h"