Disable VD shared atlas surface

Using a shared atlas surface is causing a variance in AA pixels
when drawing the same content. This is causing some CTS tests in
CtsPreference2TestCases to fail because of up to RGB(1,1,1)
difference in AA pixels in screenshots of a recreated activity.
Another effect is reducing memory usage ("GL mtrack" down by
10MB for clock app).

Test: Ran CtsPreference2TestCases tests.
Bug: 64487466
Change-Id: I1e5a547285c885136b6885d129d566d5b0c2ed76