Squashed commit of the following:

commit 6e3647ed64670ac29a0ba06b3d3a38190f180a10
Author: Felipe Leme <felipeal@google.com>
Date:   Fri Aug 17 15:19:28 2018 -0700

    Created a virtual view that uses accessibility events instead of autofill...

    ...so it can be used to test Autofill Compatibility mode.

    Test: manual verification

    Bug: 112690889

commit d2da7ab50cb33b54fbdc72b2fab6c0b2a4bad178
Author: Felipe Leme <felipeal@google.com>
Date:   Tue May 8 10:06:53 2018 -0700

    Added compat mode support to BasicHeuristicsService.

    Bug: 75285224
    Test: manual verification with Chrome