Change the way how we call setStorageParams.

Now it's unified with callback FS connector - we are passing the
callback pointer directly to dataloader. This restricts access only
to methods we want and only by someone we want.

Bug: b/153468113
Test: atest PackageManagerShellCommandTest PackageManagerShellCommandIncrementalTest IncrementalServiceTest
Change-Id: Ib557ebbe7c6c5ce92140eb20534a3626b3ac96d3