audio: add test_return_stop.cpp

Test returning a STOP code from the callback.

Bug: 120845500
Test: this is a test
Change-Id: I88aa46b356443ab055c194cb430d93618980894d
diff --git a/media/libaaudio/tests/Android.bp b/media/libaaudio/tests/Android.bp
index 319467e..cb243a0 100644
--- a/media/libaaudio/tests/Android.bp
+++ b/media/libaaudio/tests/Android.bp
@@ -184,3 +184,15 @@
         "libutils",
     ],
 }
+
+cc_test {
+    name: "test_return_stop",
+    defaults: ["libaaudio_tests_defaults"],
+    srcs: ["test_return_stop.cpp"],
+    shared_libs: [
+        "libaaudio",
+        "libbinder",
+        "libcutils",
+        "libutils",
+    ],
+}