[flexiglass] Patch for the unfurl animation

When we pull down the shade from the Lockscreen, and we navigate to the
Locked shade, there are a few things happening:

 - ExpandableNotificationRow#isOnKeyguard() changes
 - ExpandableNotificationRow#getIntrinsicHeight() changes
 - NSSL#getIntrinsicStackHeight() changes
 - NSSL#mMaxDisplayedNotifications changes

In order to orchestrate the same unfurl animations every time we open
the locked shade, we need to make these changes in the same frame, and
as well request a "goToFullShade" animation from the NSSL.
To guarantee that these things are happeing together under flexiglass,
let's update them from the same flow.

Fixes: 359875442
Test: observe the LS -> Locked Shade animation
Flag: com.android.systemui.scene_container

Change-Id: I083472c936d9057544c71ab58a7162b15465f9ec