[Dual Shade] Do not close QS edit mode on swipe up, except from bottom.

It is currently too easy to accidentally close the QS shade while in
edit mode by scrolling vertically.

Fix: 417943358
Test: Manually tested by opening the QS shade on edit mode and swiping
 up from the center, as well as from the bottom, and verifying the
 expected behavior.
Test: Added unit tests.
Flag: com.android.systemui.scene_container
Change-Id: Ib5867d887ba7f949dc864682fa4943975bde14cc