b/31458165
Because workspaceInModalState makes the VerticalFlingDetector
to consume the touch input, click is not detected in Overview mode.
Placed pulldown to search behind a feature flag.
Change-Id: I31ab69f57944a18e6b264c4f2ed2d0c1175cd940
> Renamed the id of 1st screen to 0 and making space for the QSB
by running the grid migration task.
> Added a feature flag to easily disable the QSB-in-workspace behavior
Change-Id: Ie3369f0d4433d916e9d6215d414770d4333f3e26