Move a subset of PermissionManager APIs into LegacyPermissionManager.

And move their implementation from PermissionManagerService to
LegacyPermissionService.

The DefaultPermissionGrantPolicy related methods are not APIs, and
are thus moved to LegacyPermissionManager and their usages are updated
to use LegacyPermissionManager.

The checkDeviceIdentifierAccess() method is also moved into
LegacyPermissionManager, because it's merely an application of
permission checking, not the permission management infra itself, and
there isn't great benefit in updating it. However since it is an API,
we still have to keep a delegate for it on PermissionManager, and make
the delegated method @SystemApi.

Bug: 158736025
Test: presubmit
Test: LegacyPermissionManagerServiceTest
Change-Id: Ic838f3685427217c8e0477551c3373258408983f