Swipe to refresh improvements

- Add a 1dp white background underneath the blue bar to improve visibility
on tablets
- Animate the "swipe to refresh" text to slide in from above screen
- Shrink the trigger bar on cancel (instead of hiding)
- Change font and text color to blue
- Fade out progress bar at the end of sync

Bug 8733999

Change-Id: I4a4daceaff7de3cfa7c9f3d79a804c44dfb0f0eb
3 files changed