Create all variants of stubs for mediaprovider

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

Bug: 147768409
Test: m
Test: m framework-mediaprovider-stubs-{public,system,module_libs_}api
Change-Id: Iee5b2f57017aa42635f652a3613acd224d991594
1 file changed