Revert "Remove notifyConfigurationChanged listener and policy calls"

Revert submission 28338641-remove_notify_configuration_changed

Reason for revert: Droidmonitor created revert due to http://b/353980868 - verifying through ABTD before submission.  

Reverted changes: /q/submissionid:28338641-remove_notify_configuration_changed

Change-Id: I06b37a72b5cb67e377a2deb79c14d266afdcf81f
diff --git a/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp b/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
index bbb2fc8..853f628 100644
--- a/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
+++ b/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
@@ -414,6 +414,20 @@
 };
 
 /**
+ * Create a basic configuration change and send it to input processor.
+ * Expect that the event is received by the next input stage, unmodified.
+ */
+TEST_F(UnwantedInteractionBlockerTest, ConfigurationChangedIsPassedToNextListener) {
+    // Create a basic configuration change and send to blocker
+    NotifyConfigurationChangedArgs args(/*sequenceNum=*/1, /*eventTime=*/2);
+
+    mBlocker->notifyConfigurationChanged(args);
+    NotifyConfigurationChangedArgs outArgs;
+    ASSERT_NO_FATAL_FAILURE(mTestListener.assertNotifyConfigurationChangedWasCalled(&outArgs));
+    ASSERT_EQ(args, outArgs);
+}
+
+/**
  * Keys are not handled in 'UnwantedInteractionBlocker' and should be passed
  * to next stage unmodified.
  */