Update ShadeDisplaysRepository to listen to shade display dev option

Making it so that when the shade display positon is changed by developer option, or adb command, the corresponding policy is propagagted to the repository

Bug: 379278693
Test: atest ShadeDisplaysRepositoryTest
Test: atest ShadePrimaryDisplayCommandTest
Test: manual testing with logs
Flag: com.android.systemui.shade_window_goes_around
Change-Id: I1804850c2e0c800efdc1b58fd8fd3f0685803bd9