Move RotationPolicyWrapper to SystemUI's rotation pod

Move RotationPolicyWrapper to SystemUI's rotation pod, so that it could be reused in Launcher for better testability.
This CL has no behaviour change, but just a package change.

Bug: 430756509
Flag: EXEMPT Refactor only
Test: No behaviour change, flash and check if device boots and rotation works as per usual
Change-Id: I6a38ae2ee2cb39592c4f4f763579411bb7dad17f
12 files changed