[Android] Make WebappInfoTests JUnit tests

BUG=None

Change-Id: I640ee75a03a6b9bce6a5200b50b2d3baad47e482
Reviewed-on: https://chromium-review.googlesource.com/574568
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487099}
2 files changed