Call super in setTitle in CollapsingToolbarBaseActivity

window title doesn't change because no call to super.setTitle. Call setOuterTitle in delegate so its callback will call super.setTitle.

```
Window: AccessibilityWindowInfo[title=Android Accessibility Suite, displayId=0, id=470, taskId=18, type=TYPE_APPLICATION, layer=0, region=SkRegion((0,0,1080,2340)), bounds=Rect(0, 0 - 1080, 2340), focused=true, active=true, pictureInPicture=false, hasParent=false, isAnchored=false, hasChildren=false]
```

Fix: 304648027
Test: manually verified
Change-Id: I4a290b87eee939e68920ee54a417fdc71ef48d18