[ios] Displays SaveCardInfobar above of Bottom Toolbar.

- Updates the bottomAnchorConstraint constant on sizeThatFits so its
updated by the Fullscreen changes. This will also push the Infobar above
the bottom toolbar, causing it not to be covered by the toolbar.

- Adds missing super calls to will willMoveToSuperview and
didMoveToSuperview.

Screenshots:
https://drive.google.com/open?id=1F8hUj6Cb5VEcOHuSOa8vv6wc8IXY5CeW
https://drive.google.com/open?id=1dlDS3HktGQE8iAwgsJDxcGlEo-MOBvND

Bug: 894449
Change-Id: I987f5eb3e8a8580323a0367d45c885406edcd7a0
Reviewed-on: https://chromium-review.googlesource.com/c/1334658
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607839}
1 file changed