Restore an import used in a @see tag.

This is a prerequisite for making broken @see tags an error.

This import is present upstream, so this change partially undoes an
Android change.

Bug: 80570421
Test: make docs, with doclava patched to treat these broken tags as errors
Change-Id: I3e4f46a8aae9019de0f9b005b998b346d310a7ac