fix CTS issue for case testSetOnScrollListener

Bug: 17414612

The country list is too short for 1080p device. It can be displayed fullly without scrollbar.
The fix is to make the list longer enough for scrolling.
(cherry picked from commit b97bc588ae397dfb6daf8f995a16c349dd5efcb7)

Change-Id: Id923b380f950e5e1583a625b0e3c71d4e8287ee1
Merge "fix CTS issue for case testSetOnScrollListener" into jb-dev