Revert "Fix potential failures in InputMethodService"

This reverts commit ce98507bf3.

Reason for revert: b/247426953

Change-Id: If7b7a258150f8f57a7b4a88e4926d412f948fd9c

core/java/android/inputmethodservice/IInputMethodWrapper.java

@@ -147,16 +147,12 @@ class IInputMethodWrapper extends IInputMethod.Stub
     @MainThread
     @Override
     public void executeMessage(Message msg) {
-        final InputMethod inputMethod = mInputMethod.get();
+        InputMethod inputMethod = mInputMethod.get();
         // Need a valid reference to the inputMethod for everything except a dump.
         if (inputMethod == null && msg.what != DO_DUMP) {
             Log.w(TAG, "Input method reference was null, ignoring message: " + msg.what);
             return;
         }
-        if (inputMethod != null && inputMethod.isServiceDestroyed() && msg.what != DO_DUMP) {
-            Log.w(TAG, "InputMethodService was destroyed, ignoring message: " + msg.what);
-            return;
-        }
 
         switch (msg.what) {
             case DO_DUMP: {

core/java/android/inputmethodservice/InputMethodService.java

@@ -700,6 +700,11 @@ public class InputMethodService extends AbstractInputMethodService {
         @MainThread
         @Override
         public final void initializeInternal(@NonNull IInputMethod.InitParams params) {
+            if (mDestroyed) {
+                Log.i(TAG, "The InputMethodService has already onDestroyed()."
+                    + "Ignore the initialization.");
+                return;
+            }
             Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "IMS.initializeInternal");
             mConfigTracker.onInitialize(params.configChanges);
             mPrivOps.set(params.privilegedOperations);
@@ -1065,16 +1070,6 @@ public class InputMethodService extends AbstractInputMethodService {
         public void changeInputMethodSubtype(InputMethodSubtype subtype) {
             dispatchOnCurrentInputMethodSubtypeChanged(subtype);
         }
-
-        /**
-         * {@inheritDoc}
-         * @hide
-         */
-        @MainThread
-        @Override
-        public final boolean isServiceDestroyed() {
-            return mDestroyed;
-        }
     }
 
     /**

core/java/android/view/inputmethod/InputMethod.java

@@ -417,10 +417,4 @@ public interface InputMethod {
     default void removeStylusHandwritingWindow() {
         // intentionally empty
     }
-
-    /**
-     * Return {@code true} if the {@link InputMethodService} is destroyed.
-     * @hide
-     */
-    boolean isServiceDestroyed();
 }