Add Android tests to match existing C++ browsertests.

This adds Android equivalents for the existing
UkmBrowserTests: RegularPlusIncognitoCheck and IncognitoPlusRegularCheck

Bug: 804451
Change-Id: If998e13c0f794af05f139f1072298d55db6f3ce8
Reviewed-on: https://chromium-review.googlesource.com/889360
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Bryan McQuade <bmcquade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539547}
3 files changed