[devil] Make LogcatMonitor expose its AdbWrapper instance via property.
[devil] Make LogcatMonitor expose its AdbWrapper instance via property.

BUG=chromium:627939

Review-Url: https://codereview.chromium.org/2144103002

benschmaus/catapult,sahiljain/catapult,sahiljain/catapult,catapult-project/catapult,sahiljain/catapult,catapult-project/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,benschmaus/catapult,catapult-project/catapult-csm,benschmaus/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult-csm,sahiljain/catapult,sahiljain/catapult,benschmaus/catapult