Adding system usages to AAudio

Bug: 141006627
Test: atest CtsNativeMediaAAudioTestCases:AAudioTests
Change-Id: I64247a3f64f4f7cc32f6c85c2ff790f96831f707
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index 65a60c7..c865063 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -243,7 +243,7 @@
     }
     AutoCallerClear acc;
     AudioPolicyInterface::output_type_t outputType;
-    status_t result = mAudioPolicyManager->getOutputForAttr(attr, output, session, stream, uid,
+    result = mAudioPolicyManager->getOutputForAttr(attr, output, session, stream, uid,
                                                  config,
                                                  &flags, selectedDeviceId, portId,
                                                  secondaryOutputs,