Handle minimized tasks on reboot.

- Add minimized tasks to repository on reboot.
- Find the correct task to minimize in bringDesktopAppsToFront when moving to
  desktop after a reboot.
- Refactor DesktopTaskLimiter to work on taskIds rather than running
  tasks.

Fix: 365725441
Fix: 365497269
Test: atest DesktopTasksControllerTest
Test: atest DesktopModeTasksRepositoryTest
Test: atest DesktopTasksLimiterTest
Flag: com.android.window.flags.enable_desktop_windowing_persistence
Change-Id: I96ca750846e7158e9f6b5353ac526aa48ca0964c