Add unit test for handle device config change

Bug: 236224619
Test: atest audiopolicy_tests

Merged-In: Id104edb5543dc7e50ef75e26fab7d8cdfff596f4
Change-Id: Id104edb5543dc7e50ef75e26fab7d8cdfff596f4
diff --git a/services/audiopolicy/tests/AudioPolicyTestManager.h b/services/audiopolicy/tests/AudioPolicyTestManager.h
index 7441f20..2a7a060 100644
--- a/services/audiopolicy/tests/AudioPolicyTestManager.h
+++ b/services/audiopolicy/tests/AudioPolicyTestManager.h
@@ -37,6 +37,7 @@
     using AudioPolicyManager::getDirectProfilesForAttributes;
     using AudioPolicyManager::setDeviceConnectionState;
     using AudioPolicyManager::deviceToAudioPort;
+    using AudioPolicyManager::handleDeviceConfigChange;
     uint32_t getAudioPortGeneration() const { return mAudioPortGeneration; }
 };