Call git submodule sync before git submodule update
update_submodules():
Call sync_submodules() before running git submodule update. This ensures
that the submodule update will always use up-to-date submodule repo URLs.
Bug: T335602
Bug: T157694
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update_submodules():
Call sync_submodules() before running git submodule update. This ensures
that the submodule update will always use up-to-date submodule repo URLs.
Bug: T335602
Bug: T157694