[Dialogs] Fix vertical calculations for wide actions view (material-c…

…omponents#9878)

This issue is specific to alerts with actions that are wider than the title and the message. The width of the alert, which is based on its widest part (in this case the actions) did not include the insets in the width, causing differences in calculating the final width of the alerts, and cause long actions to be truncated (Closes #8434).

PiperOrigin-RevId: 299735845

components/Dialogs/src/private/MDCAlertControllerView+Private.m

@@ -417,12 +417,12 @@ - (CGSize)actionButtonsSizeInVerticalLayout {
   NSArray<MDCButton *> *buttons = self.actionManager.buttonsInActionOrder;
   if (0 < buttons.count) {
     size.height = self.actionsInsets.top + self.actionsInsets.bottom;
-    size.width = self.actionsInsets.left + self.actionsInsets.right;
+    CGFloat widthInset = self.actionsInsets.left + self.actionsInsets.right;
     for (UIButton *button in buttons) {
       CGSize buttonSize = [button sizeThatFits:size];
       buttonSize.height = MAX(buttonSize.height, MDCDialogActionButtonMinimumHeight);
       size.height += buttonSize.height;
-      size.width = MAX(size.width, buttonSize.width);
+      size.width = MAX(size.width, buttonSize.width + widthInset);
       if (button != buttons.lastObject) {
         size.height += self.actionsVerticalMargin;
       }