Add selinux policy for CrossProfileAppsService

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.

Merged-In: I26e383a57c32c4dc9b779752b20000b283a5bfdc
Change-Id: I26e383a57c32c4dc9b779752b20000b283a5bfdc
Fix: 67765768
Test: Built with ag/3063260. Can boot and verified those APIs are working.
(cherry picked from commit 6536c9e0)