Reland "disable DAA and AAA in flutter"

This is a reland of 14211203162bb2d8f13b6393cd4dba268c5441e6

PS2 rescopes a variable tighter, and reindents to make the #if-#else
logic stand out a little more clearly.

Original change's description:
> disable DAA and AAA in flutter
>
> If we're looking to cut out unnecessary code in Flutter,
> SkScan_AAA always jumps out to me as a bunch of code that
> is not logically required for GPU rendering.
>
> Looking at a treemap[1], SkScan_AAA is the biggest chunk of
> code under src/core.  I don't see DAA... maybe it's small,
> or somehow already trimmed?  Anyway, I cut it out too.
>
> [1] https://storage.googleapis.com/flutter_infra/flutter/c8755d74c17e949ee7c19cd114f084b465dac632/android-arm-release/sizes/index.html
>
> Change-Id: I4acf4aec365504c90e6b66393fd265a399f0f525
> Reviewed-on: https://skia-review.googlesource.com/c/159760
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Klein <mtklein@google.com>

Change-Id: I6770781c26a0a581ed0df33c404386415472bed5
Reviewed-on: https://skia-review.googlesource.com/c/161581
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
2 files changed