Remove TODO(b/217788708)

With my previous CL [1],

 android.accessibilityservice.InputMethod#invalidateInputInternal

should now be executed during CTS.

Fix: 217788708
Test: atest CtsInputMethodTestCases:AccessibilityInputMethodTest
Change-Id: I74b06d4211d771f769f3ced6b8dedd37007257a0

core/java/android/accessibilityservice/InputMethod.java

@@ -624,7 +624,6 @@ public class InputMethod {
         @Override
         public void invalidateInputInternal(EditorInfo editorInfo, IInputContext inputContext,
                 int sessionId) {
-            // TODO(b/217788708): Add automated test.
             if (mStartedInputConnection instanceof RemoteInputConnection) {
                 final RemoteInputConnection ric =
                         (RemoteInputConnection) mStartedInputConnection;