Convert IAAudioClient to AIDL

Bug: 160253486
Test: Manual testing using OboeTester
      Ran atest CtsNativeMediaAAudioTestCases
Change-Id: I18e6c03144c59ce78181abf7c509c21f2724ad22
diff --git a/media/libaaudio/Android.bp b/media/libaaudio/Android.bp
index 140052f..e81ab06 100644
--- a/media/libaaudio/Android.bp
+++ b/media/libaaudio/Android.bp
@@ -32,5 +32,6 @@
 cc_library_headers {
     name: "libaaudio_headers",
     export_include_dirs: ["include"],
+    export_header_lib_headers: ["aaudio-aidl-cpp"],
+    header_libs: ["aaudio-aidl-cpp"],
 }
-