TV SysUI functional tests base

This is an initial CL to add functional tests for TV SysUI
Leanback Launcher, Setting, Recents and Multiwindow.
This includes both hermetic and non-hermetic tests for
acceptance testing.
This test suite could be deployed to the testing service for
continuous test runs.

Bug: 30299617
Change-Id: If96334516843e90b1e19b0d7067e3e5e800b449d