[Android Tests] Fix several FirstRunIntegrationTests

This CL converts several FirstRunIntegrationTests to JUnit tests and
re-enables them.

BUG=911316

Change-Id: I7aada68234fe9a5cb25ee3bef29538cec537d49a
Reviewed-on: https://chromium-review.googlesource.com/c/1362812
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614630}
3 files changed