Run instrumentation tests with PlzNavigate on the Android waterfall.

chrome_public_test_apk has 8 tests still failing, so it'll be added later.

Marshmallow 64 bit bot is used since it's not on the CQ, as we don't have capacity yet to enable this on the main waterfall. Also OS specific breakages should be rare.

BUG=699242

Review-Url: https://codereview.chromium.org/2750003005
Cr-Commit-Position: refs/heads/master@{#457957}
1 file changed