Inform the delegate that the action sheet is dismissed when the dismissal is issued from the accessibility gesture.

PiperOrigin-RevId: 366940774

Author: Nobody

components/ActionSheet/src/MDCActionSheetController.m

@@ -306,7 +306,15 @@ - (BOOL)accessibilityPerformEscape {
   if (!self.dismissOnBackgroundTap) {
     return NO;
   }
-  [self dismissViewControllerAnimated:YES completion:nil];
+  [self
+      dismissViewControllerAnimated:YES
+                         completion:^{
+                           if ([self.delegate
+                                   respondsToSelector:@selector
+                                   (actionSheetControllerDismissalAnimationCompleted:)]) {
+                             [self.delegate actionSheetControllerDismissalAnimationCompleted:self];
+                           }
+                         }];
   return YES;
 }