Print more logs when using default Platform Some logs prior to Test Platform initialization were getting lost. 1. Also print WARN() to stdout 2. Use Android specific logging facilities BUG=angleproject:1660 Change-Id: I8424958426809567396ef24cedc2d427a3a21959 Reviewed-on: https://chromium-review.googlesource.com/887944 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>