ViewRoot: Check Surface validity before initializing renderer from draw().

Imagine we have a ViewRoot for a PopupWindow so it's view visibility
will not directly be affected by the stopped state, but we still
will end up destroying the surface. We could see a handler queue like this:
("handleStopped", "performTraversals"). If there were no size changes
we won't call relayout and we won't notice we have lost the Surface
and it seems there is nothing to prevent us from continuing in to draw.
However, if we have handled STOP then the surface is now destroyed. Ensure
we respect the stop signal and the released state it sets on the Surface. The
original intent of this code-path should be preserved in the case that
the client receives a new surface from relayout even if it hasn't yet received
setWindowStopped(false).

Bug: 62536731
Test: Manual
Change-Id: I0eccd4dbfd00f9f61ad37086299f986463082a1f