Run upgrade assistant on all samples.

[DanAlbert]

Not quite all. I skipped the other-builds directory because 'tis a silly place that needs to just be merged with the core samples properly as a build variant rather than being a distinct project.

[jfgoog]

I did not scrutinize every diff; I assume these are all automated changes. Anything you did that was manual should be in a separate change.

[DanAlbert]

I did not scrutinize every diff; I assume these are all automated changes. Anything you did that was manual should be in a separate change.

It's all automatic, or minor fixups that the automated change required (adding the namespace property in a project or two that was missing it). That can't be done in a separate change because the build breaks without it.