Android: Enable overscroll navigation on NTP

Now that the new API for feed lib is ready, hooks up the view of
FeedNewTabPage up with it to enable overscroll navigation on NTP.

Bug: 865567, 925156
Change-Id: I4c1a78acfe3241de5b8d9ca0a508727cc4f068a0
Reviewed-on: https://chromium-review.googlesource.com/c/1490364
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636215}
1 file changed