Allow system server to write profile snapshots in /data/misc/profman

The goal is to allow creating profile snapshots from the shell command in
order to be able to write CTS tests.

The system server will dump profiles for debuggable in /data/misc/profman
from where they will be pulled and verified by CTS tests.

Test: adb shell cmd package snapshot-profile com.android.vending
Bug: 74081010
Change-Id: I54690305284b92c0e759538303cb98c93ce92dd5