AIDLize IAudioPolicyServiceClient

Bug: 160253486
Test: Audio-related tests from CtsMediaTestCases
Change-Id: Id37fad4028b620620a45dabe8af068f3158e6228
diff --git a/services/audioflinger/Android.bp b/services/audioflinger/Android.bp
index 87b5ff4..a005250 100644
--- a/services/audioflinger/Android.bp
+++ b/services/audioflinger/Android.bp
@@ -69,6 +69,7 @@
     ],
 
     header_libs: [
+        "libaudioclient_headers",
         "libaudiohal_headers",
         "libmedia_headers",
     ],