Revert "disable DAA and AAA in flutter"

This reverts commit 14211203162bb2d8f13b6393cd4dba268c5441e6.

Reason for revert

Unused variable in Google3:

   constexpr SkScalar kSmallCubicThreshold = 16;

Huh.

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>

TBR=mtklein@google.com,csmartdalton@google.com,liyuqian@google.com,reed@google.com

Change-Id: I40c912aeed656d21455ca983b9001b1c1e1558a1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/161720
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
2 files changed