11/ Clean up usage of exported interfaces from internal controllers

- Adding documentation for dagger setup for shell
- We should only reference the controllers from shell code instead of
  through the external interfaces.  This reduces the number of exposed
  methods, and is also more direct (it ends up in the controller
  anyways).  This means that the base module will provide the
  controllers separately and we can remove some duplication in the
  create methods for the controllers (except in cases where it's doing
  other initialization)
- Remove SizeCompatUi interface since it's not actually used in SysUI
- Group related dependencies in the module to make it a little eaiser
  to parse

Bug: 161979899
Test: atest WMShellUnitTests
Test: atest SystemUITests
Change-Id: I07c2c002b87ffd127ebfce67b5485ff47d127e1f