Tweak loading-animation speed and motion curves

These are changed to decrease the minimum time that the loading
animation can take. It's also done to make it feel snappier.

Bug: chromium:912620
Change-Id: If8e792cccc1f9f01bbe86909ce581bffbf1a7c35
Reviewed-on: https://chromium-review.googlesource.com/c/1377344
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616795}
2 files changed