Replace @GlobalConfig with @Main

This ensures more consistency as we're already using @Main for several other classes.
Having GlobalConfig in inject constructor was not nice and seemed something different than the @Main annotation for resources or context.

Bug: 362719719
Bug: 374267505
Test: presubmits
Flag: com.android.systemui.shade_window_goes_around
Change-Id: I92ce16e3d1eb245f5065414d29a6cbd7ce107ce7