Add options to control virtio-media

[changyeon-jo]

Implement two options to control two crosvm's command line options below:

• --crosvm_simple-media-device
• --crosvm_v4l2-proxy=

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[changyeon-jo]

Please kindly review changes to be able to set two new crosvm flags from a configuration JSON file.

[cjreynol]

@changyeon-jo Will you rebase the Add options to control virtio-media commit on top of our main branch and get rid of the merge commits? We have the "Require linear history" setting turned on for this repository and I believe attempting to complete the PR as is will be rejected by the Github UI.

[changyeon-jo]

@cjreynol, thanks for letting me know about the policy. I'll update this PR with a clean history soon.

[changyeon-jo]

@cjreynol, I've updated this PR as you requested. Please kindly check and let me know if you have any questions. Thanks!

[cjreynol]

Thanks for taking care of that!

I am looking into the failed kokoro check. Running those tests manually succeeded and we have an issue with the test script collecting logs, so I will follow up once I can recreate the failure or can get some logs from the runner.

[cjreynol]

@changyeon-jo

Triggered another kokoro run in case the previous failure was due to flakiness. If the check fails again would you please:

• wait until #1069 merges
• rebase on main again so those changes are included

That PR fixes the log collection for the kokoro check, which will allow me to debug the failure.