Default Async DNS to enabled on Android.

This features has been rolled out to 100% on all Android channels
for a while now so this should present no change in behavior.
This change prepares us for experiment expiration but still allows
for finch control of this feature.

Bug: 768874
Change-Id: I5afb238db567c13be947236fdefb9eee1ac8095f
Reviewed-on: https://chromium-review.googlesource.com/1079262
Reviewed-by: Misha Efimov <mef@chromium.org>
Commit-Queue: Paul Jensen <pauljensen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563190}
1 file changed