GitLab

Move the ripple animation handler to a new animations file, and move
common helper functions into a new utils file.

This enables us to add ripple animations to the edit custom link dialog
buttons.

Bug: 874201
Change-Id: I5e3d72bf3fa282faf0068122f1a660e8ad72bab3
Reviewed-on: https://chromium-review.googlesource.com/c/1347776
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Ramya Nagarajan <ramyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611227}