[flexiglass] Swipe up from shade goes to correct scene.

Fix: 295214677
Test: integration and unit tests added; work was done in TDD fashion,
the tests were added first, then the produciton code to make them pass
Test: manually verified that, with None, we still skip the lockscreen at
all times
Test: manually verified that, with Swipe, swiping up in the shade scene
goes to lockscreen if it needs to be dismissed or to gone if it's
already dismissed
Test: manually verfieid that, with PIN, swiping up in the shade scene
goes to lockscreen if the device is locked or to gone of it's already
unlocked

Change-Id: Ia174a07277fc108031f206b5daaca06a34a1c379