Allow getRoleHolders() to be called with GET_ROLE_HOLDERS permission.

Bug: 421396159
Bug: 390242232
Test: atest CtsRoleTestCases and atest CtsPermissionPolicyTestCases
Flag: android.permission.flags.supervision_role_enabled
Relnote: n/a
LOW_COVERAGE_REASON=b/421396159
Change-Id: I521c4feb340a4d89429dc60f49467923fc40f7c2
5 files changed