This a layer of flag guarding only for the implementation of Private Space features excluding the APIs. The MVP flag allow_private_profile still guards all the features including the APIs.
Bug: 326060689
Test: Manual - a few verifications that some feeatures are unavailable when this flag is disabled
Test: Run presubmits and verify that nothing breaks
Change-Id: I05f7e2f20c6132b33484bb133ce03a933ece485f
This change includes implementaion for below:
1. Add a preference inside private space settings page with a toggle switch to control hide/unhide
private space entry in All Apps
2. Store the preference value in settingsprovider for persistence.
Bug: 302682054
Test: Manual
Change-Id: Ia1a56fc2c43550e23c00a61a5ce4742e42effcbe
