ui: Deduplicate rotation types

Introduce ui::Rotation, replacing ISurfaceComposer::Rotation as well as
DISPLAY_ORIENTATION_* and DisplayState::eOrientation* constants.

libinput has widespread use of int32_t for orientation, so move
DISPLAY_ORIENTATION_* to input/DisplayViewport.h for now.

Bug: 144601064
Test: go/wm-smoke
Test: screencap
Change-Id: Ic4b8494e37c9d79c00d5b4be5eb88585f09efebf