Add improveLargeScreenInteractionOnLockscreen config parameter

Reasoning behind this is that on large-screen form factors,
independent of whether mouse or touch is the primary input,
some screen interactions change, for example:
- input buttons don't need to be close to the edge for easy
one-handed input,
- swiping is less convenient for navigation
(e.g. going to the previous screen).

Add repository and interactor methods to read the parameter.

For CL enabling this config for desktop see: ag/33553437

Test: manual
Bug: 416223998
Flag: EXEMPT config change
Change-Id: Ie2ffb09c1631d6f60e0b47c00b551ebf3f0dc147