Fixed bug with stack bounds getting out of alignment with screen rotation

Before updating the stack bounds due to rotation change, we need to make
sure both the configuration and the current display info. the stack is
using have been updated for the current rotation. Previously we were
updating is after configuration change, but the rotation might have changed
again by the time we get the configuraiton changed call and
TaskSack.updateDisplayInfo not called yet.

Bug: 26744649
Change-Id: Idfd30e78dc9c2fb521ff1957f043c3b1696a2a31