Remove unused parameter from getSharedPackages

Since we changed getSharedPackages to get shared package names from
callingIdentity, we don't use callingPackage parameter in this method.
Removed unused callingPackage parameter from getSharedPackages method.

Bug: 158637603
Test: atest --test-mapping packages/providers/MediaProvider
Change-Id: I18fb21e0cde37f9a4de65aea10f5610ee8542457
1 file changed