Create all variants of stubs for permission

Add separate publicapi, systemapi and module_libs stubs for permission,
and use a naming scheme consistent with other modules.

Bug: 147768409
Test: m
Test: m framework-permission-stubs-{public,system,module_libs_}api
Change-Id: I0bd870f5418bab55e0507a57c72db1c088f732d2