Fix some UX polish bugs

Remove last chatted to for 1 day and under
Try to adaptively add more outer padding to 2x1 with a max of 16dp
Let small layout match parent height

Test: PeopleSpaceUtilsTest
Bug: 184606325, 182471248, 185138047
Change-Id: I08a305dacf2b249475ffe0231f0412e694c2922a