autotest: Migrate network_WiFiMatFunc/010CheckRxFrag to new framework

Also added HostapConfig flags for fragmentation threshold.

BUG=chromium:230660
TEST=This is a test.  It passes.

Change-Id: I981499ef0c7f2dc7d517fb9bddbccc1bf18360e9
Reviewed-on: https://gerrit.chromium.org/gerrit/50088
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
5 files changed