Merge changes from topic "hwcomposer-cleanup"

* changes:
  graphics: add composer 2.2 default impl
  graphics: convert composer default impl to a library
  graphics: add Composer to HAL support library
  graphics: move ComposerClient to HAL support library
  graphics: add ComposerCommandEngine
  graphics: add ComposerResources
  graphics: move ComposerBase to HAL support library
  graphics: add libhwc2on{1,fb}adapter
  graphics: more reusable libVtsHalGraphicsComposerTestUtils
  graphics: clang-format composer VTS
  graphics: move libVtsHalGraphicsComposerTestUtils