[bc25] Set Dual Shade destination scenes to match the shade alignment.

Bug: 343744476
Test: Manually verified on a device by opening and closing the
notifications dual shade.
Test: Added unit tests, and existing ones still pass.
Flag: com.android.systemui.dual_shade

Change-Id: I04689b675fcddd375c0a076030dae3dcc4fd737d
7 files changed