Move requiredDeps to OverridableDepsMutator

Required properties can be overridden too. This adds requiredDeps in
OverridablePropertiesDepsMutator for modules like override_apex.

Bug: 398089235
Test: m nothing --no-skip-soong-tests
Test: boot cuttlefish, TH
Change-Id: I996543764b86136b8f8ae4427f5f977c7ac6553b