Create RotationChangeProvider in sysui

This allows to subscribe to rotation changes in a specific executor.
Raw usages of IRotationWatcher made the callback be received in a binder thread (not the main one).

Usages in child cls to make each small.

Bug: 241743859
Test: RotationChangeProviderTest
Change-Id: I2de074a3d5330d93b3d4cc2be1e60864a34ce6a6