Revert^2 [SB] Create `statusbar.layout` package and move relevant files there.

Bug: 364653005
Test: atest LetterboxAppearanceCalculatorTest
StatusBarBoundsProviderTest StatusBarContentInsetsProviderTest
Flag: EXEMPT refactor

Reverted changes: /q/submissionid:31176835-revert-31155411-caitlinshk-sb-layout-package-CJZDMAYNEH

Reason for revert: Original CL was ok, there's an automerger bug (see b/388039530#comment11)

Change-Id: I69184f46d75b166d7b36546cc350a0b5b107508a