Fix issues related to saveLayer/restore deferral

bug:8464795

Changes drawModifiers and alpha to be restored for all operations,
since saveLayer/restore use these values, not just draw operations

Also forces a renderer state restoration before a deferred restore op
is played back, in case it is associated with a saveLayer that
doesn't have the save_clip flag set

Change-Id: I9da5d44fefbfffdee164c98f4f139843dacf85df