CrossProfileAppsService allows apps to do limited cross profile
operations, like checking the caller package is installed in
the specified user. It is similar to LauncherAppsService in some sense.

Change-Id: I26e383a57c32c4dc9b779752b20000b283a5bfdc
Fix: 67765768
Test: Built with ag/3063260. Can boot and verified those APIs are working.