GuidedStepFragment: support expand/collapse sub actions.
Refactored GuidedActonsStylist.ViewHolder to be subclass of
RecyclerView.ViewHolder, since GuidedActionsStylistis already
assumes running in RecyclerView and adding scroll listener.
There is no benefit of hiding RecyclerView.
Added support to disable focus right / left in actions list
view. We don't allow focus to the side buttons from sub actions.
Also disable focus left so it won't be interpreted by a bottom
BrowseFragment as open fast lane.
Expand/collapse animation is yet to be added.
Bug 24979518
Change-Id: I4309e63347e5b85b746477f988721fd4fca67943
18 files changed