[DisplayList] Inconsistencies with how opacity peephole compatibility is tracked

[flar]

The compatibility of a layer or DisplayList with opacity peephole optimizations is tracked in 2 separate mechanisms.

The bounds accumulator checks for overlapping primitives which interferes with opacity optimizations.
The compatibility of the current rendering attributes is checked on each rendering operation and recorded as a flag.

A couple of the rendering options in the DisplayListBuilder (drawAtlas, drawVertices, drawDisplayList, drawText*) sometimes pass along a "we can't tell if our operations overlap so we need to disable opacity optimization" but they do so through the mechanism that tracks rendering attributes rather than through the bounds accumulator which would be a more accurate assessment of their conditions. This does not appear to introduce any bugs, but these cases should be tracked consistently in case we come up with a more sophisticated way to evaluate the opacity peephole conditions in the future.