[iOS][Password-Breach] Style view controller

Style all the views with the UI specification.
Add support for dynamic type.
Wrap contents in a scroll view for the bigger font sizes.
Add support for horizontal and vertical size class changes.
Present as Form on iPad.

Bug: 1008862
Change-Id: I9a107bb14e9bd1669462c9a383243a213a970aa8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1847339
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705084}

ios/chrome/browser/ui/passwords/BUILD.gn

@@ -21,6 +21,7 @@ source_set("passwords") {
     "//ios/chrome/app/strings",
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
+    "//ios/chrome/browser/ui/util",
     "//ios/chrome/common/colors",
     "//ios/chrome/common/ui_util",
     "//ui/base",

ios/chrome/browser/ui/passwords/password_breach_coordinator.mm

@@ -63,6 +63,10 @@
 - (void)showPasswordBreachForLeakType:(CredentialLeakType)leakType
                                   URL:(const GURL&)URL {
   self.viewController = [[PasswordBreachViewController alloc] init];
+  self.viewController.modalPresentationStyle = UIModalPresentationFormSheet;
+  if (@available(iOS 13, *)) {
+    self.viewController.modalInPresentation = YES;
+  }
   id<ApplicationCommands> dispatcher =
       static_cast<id<ApplicationCommands>>(self.dispatcher);
   self.mediator =