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>
2 files changed