Add layout for 1x1 size, update 2x1

This allows users a smaller width resize for the People Tile widget, and
adjust the view accordingly after resize. Implements 1x1 and 2x1 mocks,
with polish remaining for 2x1.
Also fixes a crash when launching the conversation picker and bug on
removing missed call notifications.

Bug: 182377480
Test: PeopleSpaceUtilsTest
Change-Id: Ie3b16fb3e348f8edd7bb314c9f43408dca7b43e2