Add EC and Firmware Versions to the Omaha Response. This CL adds 2 additional utils methods to get the version for both the fw and ec versions. I've added a unittest to verify these work and piped in the values into the omaha response. BUG=chromium:219871 TEST=Unittests + on device Change-Id: Iadf70fff858988f52797d94bcdb062bb2482bbf3 Reviewed-on: https://gerrit.chromium.org/gerrit/49713 Commit-Queue: Chris Sosa <[email protected]> Reviewed-by: Chris Sosa <[email protected]> Tested-by: Chris Sosa <[email protected]>