Window Manager Flag Migration (12/n)

- Unhide new APIs
- MaxInsets -> InsetsIgnoringVisibility
- Deprecate SystemUI flags
- Deprecate some other stuff

Bug: 118118435
Test: Build, CTS coming soon
Change-Id: I0a0cbdb48258b3779d536668b59e8c88f3c96d18
Exempt-From-Owner-Approval: Trivial rename
40 files changed