[Android] Adding Smart GO/NEXT feature in Chrome

[Android] Adding Smart GO/NEXT feature in Chrome

Smart Go/Next brings better user experience to the user during form submitting applications.
For navigating between form elements, user can use NEXT/PREVIOUS button from IME
without touching on individual fields. This will avoid unnecessary form submissions before
filling or visiting all fields in the form.

Additionally it will save user time and avoid redundant network requests before actually
filling/attending entire fields in the form

Design Document: https://docs.google.com/document/d/1h0diigZ8LUi7A3UKJ_zwNUbvNQoe-Nwr55_p6ivSPNg/edit?usp=sharing

BUG=410785, 648986
patch from issue 2839993002 at patchset 280001 (http://crrev.com/2839993002#ps280001)