Limit creating new surface for legacy apps to size changes.

Creating the surface for every change (such as creation and
visibility) can lead to issues swapping buffers. This
changelist limits the action to only when the size changes.

Change-Id: Ic549d244613a93a43a9f4ddf284bbfb0c13300fa
Fixes: 62801621
Test: follow repro steps in bug, verified no crash.
Test: go/wm-smoke