Warn the user about impending personal app suspension.

* updatePersonalAppsSuspension is invoked for all events relevant
  to profile maximum time off: user stopped, user unlocked,
  system boot, deadline alarm goes off,
  setManagedProfileMaximumTimeOff called.
* It takes all relecant bits of state into account: policy,
  current deadline, user state. It calculates the new state
  of the deadline, notification and alarm and makes appropriate
  changes (e.g. schedules the alarm, posts notification, suspens
  apps).
* Updated package manager query flags so that even when personal
  apps are being suspended while the user is locked, it includes
  non direct boot aware apps as well.

Test: manual, with TestDPC
Test: atest OrgOwnedProfileOwnerTest#testWorkProfileMaximumTimeOff
Test: atest com.android.server.devicepolicy.DevicePolicyManagerTest
Test: atest OrgOwnedProfileOwnerTest#testPersonalAppsSuspensionNormalApp
Bug: 149075510
Change-Id: I94d2582c7af91a5d97e67d2baf2e15f0a6d5ffa9