Enfore cross-user permission to getPackagesForUid

Apps could use getPackagesForUid with given UID to query if there
is a installed and get its package name across user. Expect for
package visibility filtering, we also need to ensure across-user
calls come with appropriate permission.

Bug: 167654926
Test: atest ApplicationVisibilityTest
Change-Id: I435e0160128591b50ddd5998e7c558b78aaca9b1