Convert IAAudioClient to AIDL

Bug: 160253486
Test: Manual testing using OboeTester
      Ran atest CtsNativeMediaAAudioTestCases
Change-Id: I18e6c03144c59ce78181abf7c509c21f2724ad22
diff --git a/services/oboeservice/Android.bp b/services/oboeservice/Android.bp
index 8b1e2c0..b4559a5 100644
--- a/services/oboeservice/Android.bp
+++ b/services/oboeservice/Android.bp
@@ -57,6 +57,10 @@
         "libutils",
     ],
 
+    export_shared_lib_headers: [
+        "libaaudio_internal",
+    ],
+
     header_libs: [
         "libaudiohal_headers",
     ],