Enforce package visibility to the api getAppOpPermissionPackages

App can query which applications are installed on the device via
the api IPackageManager#getAppOpPermissionPackages. This cl enforcing
the package visibility filter to the api to fix the package information
disclosure issue.

Bug: 188913056
Test: atest AppEnumerationInternalTests
Change-Id: Ic2771051babab49d885d0b21d9d8f7e9ae1d8418