NetworkService: List ResourceDispatcherHost related browser tests under its own category in the filter

Since ResourceDispatcherHost isn't used with the network service, this CL lists
ResourceDispatcherHost related browser tests under its own category in the filter
with a bug filed.

Bug: 769401
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I92eb230212eb5e326c7614a6f704ae9b44ded334
Reviewed-on: https://chromium-review.googlesource.com/782759
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518656}
2 files changed