Remove TODOs for adding CTS tests.

Bug: 232341407
Bug: 232845902
Test: atest KeyboardVisibilityControlTest#testHideImeAfterBackPressed_ScreenOffOn --no-bazel-mode
Test: atest KeyboardVisibilityControlTest#testNonImeFocusablePopupWindow_onTopOfIme --no-bazel-mode

Change-Id: I36ce1846b6f1cfdbb8a9679306966a205842b3ff

core/java/android/inputmethodservice/InputMethodService.java

@@ -2897,7 +2897,6 @@ public class InputMethodService extends AbstractInputMethodService {
         // Back callback is typically unregistered in {@link #hideWindow()}, but it's possible
         // for {@link #doFinishInput()} to be called without {@link #hideWindow()} so we also
         // unregister here.
-        // TODO(b/232341407): Add CTS to verify back behavior after screen on / off.
         unregisterCompatOnBackInvokedCallback();
     }
 

core/java/android/window/ImeOnBackInvokedDispatcher.java

@@ -219,8 +219,6 @@ public class ImeOnBackInvokedDispatcher implements OnBackInvokedDispatcher, Parc
      * @param previous the previously focused {@link ViewRootImpl}.
      * @param current the currently focused {@link ViewRootImpl}.
      */
-    // TODO(b/232845902): Add CTS to test IME back behavior when there's root view change while
-    // IME is up.
     public void switchRootView(ViewRootImpl previous, ViewRootImpl current) {
         for (ImeOnBackInvokedCallback imeCallback : mImeCallbacks) {
             if (previous != null) {