PackageManagerNative: Implement getModuleMetadataPackageName

* If configuration has config_defaultModuleMetadataProvider,
  it's value is returned.
* Otherwise, currently IllegalStateException is thrown. It will be
  changed to return empty string in a follow-up CL.

Test: builds
Bug: 131774400
Change-Id: I33df0fe25eca3370c4a4ddf77b29d3f228ffdf22