Invalidate autofill session on IME disconnect

Remember the latest InlineSuggestionsRequestCallback coming from the
autofill service, so that its autofill session can be invalidated
when the IME process is unbound or stopped.

Test: atest InlineWebViewActivityTest#testAutofillOneDataset
Bug: 226240255
Change-Id: I49cf295b95cec33b7eb404eab62b900014d09e26

services/core/java/com/android/server/inputmethod/InputMethodBindingController.java

@@ -275,6 +275,7 @@ final class InputMethodBindingController {
     private final ServiceConnection mVisibleConnection = new ServiceConnection() {
         @Override public void onBindingDied(ComponentName name) {
             synchronized (ImfLock.class) {
+                mService.invalidateAutofillSessionLocked();
                 if (mVisibleBound) {
                     unbindVisibleConnection();
                 }
@@ -285,6 +286,9 @@ final class InputMethodBindingController {
         }
 
         @Override public void onServiceDisconnected(ComponentName name) {
+            synchronized (ImfLock.class) {
+                mService.invalidateAutofillSessionLocked();
+            }
         }
     };
 

services/core/java/com/android/server/inputmethod/InputMethodManagerService.java

@@ -312,6 +312,15 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
     @Nullable
     private CreateInlineSuggestionsRequest mPendingInlineSuggestionsRequest;
 
+    /**
+     * A callback into the autofill service obtained from the latest call to
+     * {@link #onCreateInlineSuggestionsRequestLocked}, which can be used to invalidate an
+     * autofill session in case the IME process dies.
+     */
+    @GuardedBy("ImfLock.class")
+    @Nullable
+    private IInlineSuggestionsRequestCallback mInlineSuggestionsRequestCallback;
+
     @UserIdInt
     private int mLastSwitchUserId;
 
@@ -2169,6 +2178,7 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
             InlineSuggestionsRequestInfo requestInfo, IInlineSuggestionsRequestCallback callback,
             boolean touchExplorationEnabled) {
         clearPendingInlineSuggestionsRequestLocked();
+        mInlineSuggestionsRequestCallback = callback;
         final InputMethodInfo imi = mMethodMap.get(getSelectedMethodIdLocked());
         try {
             if (userId == mSettings.getCurrentUserId()
@@ -2788,6 +2798,7 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
             if (DEBUG) {
                 Slog.d(TAG, "Avoiding IME startup and unbinding current input method.");
             }
+            invalidateAutofillSessionLocked();
             mBindingController.unbindCurrentMethod();
             return InputBindResult.NO_EDITOR;
         }
@@ -2825,6 +2836,17 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
         return mBindingController.bindCurrentMethod();
     }
 
+    @GuardedBy("ImfLock.class")
+    void invalidateAutofillSessionLocked() {
+        if (mInlineSuggestionsRequestCallback != null) {
+            try {
+                mInlineSuggestionsRequestCallback.onInlineSuggestionsSessionInvalidated();
+            } catch (RemoteException e) {
+                Slog.e(TAG, "Cannot invalidate autofill session.", e);
+            }
+        }
+    }
+
     @GuardedBy("ImfLock.class")
     private boolean shouldPreventImeStartupLocked(
             @NonNull String selectedMethodId,