Don't restart SCM apps when moved between displays

Density and colorMode are already sandboxed in SCM to prevent apps
in SCM from being restart when moved between displays, but there
are some other factors that could change and affect activity
restart.

Flag: com.android.window.flags.enable_size_compat_mode_improvements_for_connected_displays
Bug: 399749909
Test: SizeCompatTest#testFixedScreenConfigurationWhenMovingToDisplay
Change-Id: I9876fccda2e08a9cc97e4963290c6f05516f90f6