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Add Autofill App Interface with the app code so EG2 can interact
with the app.
Move matchers to chrome matchers.
Create new EG2 tests and needed targets.

Bug: 1016368
Change-Id: If2256944612b3c7a6523dd3e1f9e36b79fc1d15b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1872058
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708935}