[devil] Handle multi APK system apps
[devil] Handle multi APK system apps

Updates system_app.py to properly handle apps that have multiple APKs.
In these instances, all the APKs need to be removed, otherwise the app
will still be installed according to Android.

Change-Id: I75c050810262bb6029b7f0d449f0c4341ad70900
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3756263
Reviewed-by: Alexander Cooper <77fdbefbce0132335ec3536d86a3b837e44c59d6@chromium.org>
Commit-Queue: Brian Sheedy <8cdc5cc1fa60ba15acb0d296e6f5592b7bb7d71c@chromium.org>
Auto-Submit: Brian Sheedy <8cdc5cc1fa60ba15acb0d296e6f5592b7bb7d71c@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult