Add preserved displays to persistent repo.

Allows disconnected displays to be persisted, enabling them to be restored after reboot. Also adds task bounds to the DesktopTask message to allow for restoring at the correct bounds rather than default position.

Bug: 401107440
Test: Manual
Flag: com.android.window.flags.enable_display_reconnect_interaction

Change-Id: I6ce5b6d0ca29490b7fefcb9d4f23cec99b9005f5