Revert "Change links to Streams packages to {@code}."

This reverts commit b4998e53d91ce1decfa7c7634d80143626cf7fa1.

As the stream package has been made public, these changes should be
reverted.

Bug: 27426738
Bug: 27692239
Change-Id: Ifadb6ba49ee23859069ab7d16863da2fd2a4dfc6
3 files changed