Making sure QS are not closed when split shade is open

1. Checking that we can actually close QS, that is we're really closing shade
2. Logging when we're forcing closing QS in split shade
3. Removing unnecessary call to closeQS from ShadeControllerImpl - "collapsePanel" already tries closing QS anyway

Fixes: 264558771
Bug: 219589379
Test: In full screen app try swiping split shade up and when it disappears - without lifting finger from screen - swipe quickly down
Change-Id: Icc6899018e0815e4729bcefd02163a5a9cfec022