Use layout weight attr and scrollview in lock pattern screen.

General idea is to stop UI distortion when display size set to
largest. Use layout weight to distribute space by ratio, and use
scroll view to wrap "title and summary" layout in case display
size are too large to display.

Bug: 32057149
Test: Visual

Change-Id: Ie800e4c5e98f6bbd699395168cfc228f8b65ac7f