Add RDK repo at external/components/generic/cobalt under starboard/contrib/rdk - #5621

Should i add a DEPS file ? starboard/contrib/rdk/DEPS ?

There's a license file : starboard/contrib/rdk/LICENSE , do i need to add it to cobalt/content/licenses/platform/default/licenses_cobalt.txt ?

Should i add a METADATA file ? starboard/contrib/rdk/METADATA ?

Got all this from these instructions here: https://g3doc.corp.google.com/company/teams/cobalt/team/infrastructure/code_repository/add_new_repo.md?cl=head
Commands i ran: https://b.corp.google.com/issues/406054987#comment31

ptal @kaidokert

Do we consider to use git submodule to integrate RDK starboard? We can keep all the git logs when we change to submodule folder and run git log. Further more, we can change to newer version of RDK starboard by simply change the commit hash. And the RDK source code is downloaded only when we want to build it.

A PR with git submodule is available at: #5629
FYI

Do we consider to use git submodule to integrate RDK starboard? We can keep all the git logs when we change to submodule folder and run git log. Further more, we can change to newer version of RDK starboard by simply change the commit hash. And the RDK source code is downloaded only when we want to build it.

@jonastsai we could consider this, but for all external repos until now we have followed git subtree procedure - so idk if it makes sense to make an exception for this repo. See #5621 (comment) for what instructions i followed. @oxve might have more ideas on why we chose git subtree instead of submodule

Edit: Thanks @oxve for providing the doc
here's the doc why we chose subtree: Unlike gclient DEPS or git submodules, git subtrees create copies of repositories without generating DEPS or .gitmodule metadata files. https://docs.google.com/document/d/1-I6GILtk2adC49QU6UwyWjpcsvZ5WFWf3gHitmCDfuM/edit?tab=t.0