Port desktop-first policy’s top-fullscreen check to LPM

This CL is a LPM version of I784b9b8eace2f7a43775e70be63e3748fd5416f0.
When no desk is active and home is invisible, we don’t want to apply
desktop-first policy.

Flag: com.android.window.flags.enable_desktop_first_top_fullscreen_bugfix
Flag: com.android.window.flags.enable_desktop_first_policy_in_lpm
Bug: 431066262
Bug: 431866074
Test: DesktopModeLaunchParamsModifierTests
Change-Id: I8bc12ec3ecc9aee1fcea465b83d9a6fdf5a2260f