Set qsb fade interpolator same as workspace for home <-> overview

Test: go to overview from home and vice versa in 0 and 3 button modes,
ensure QSB fades at the same rate as the rest of workspace

Bug: 154637581
Change-Id: I2f15aaf2ba59e6b1d4754060e7b3005bed5db9c7
1 file changed