[bc25] Remove SceneFamilies.NotifShade and associated resolver code.

Bug: 356596436
Flag: com.android.systemui.scene_container
Test: Existing unit tests still pass.
Test: Tested manually that Single and Split shades are still working
 by expanding and collapsing each on both Gone and Lockscreen.
Change-Id: I535a27bc3342bfd61b07ef2d426ee5e025064f7f
8 files changed