Revert of QUIC - Android - small experiment to flush http_server_properties (patchset...

Revert of QUIC - Android - small experiment to flush http_server_properties (patchset #1 id:1 of https://codereview.chromium.org/667473003/)

Reason for revert:
We have found out that this change is not needed. When QUIC enabled experiment is used, we are persisting Alternate Protocol information properly (we don't see high percentage of missing alternate protocols).

Original issue's description:
> QUIC - Android - small experiment to flush http_server_properties
> changes to disk every 500ms instead of 5secs. We are hoping if QUIC is
> used as an alternate protocol, we will persist that information to disk
> quicker. Hopefully, this would improve the QUIC winning the alternate
> protocol race.
>
> R=rch@chromium.org
>
> Committed: https://crrev.com/708a3ef67431831c2a29aa35202fa446011020b4
> Cr-Commit-Position: refs/heads/master@{#300318}

TBR=rch@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/754563004

Cr-Commit-Position: refs/heads/master@{#305754}