Refactor RemoteInstanceDeviceFactory out of local_image_remote_instance.py

We're extracting the factory so that it can be utilized by moving
RemoteInstanceDeviceFactory to remote_instance_cf_device_factory.py

Bug:134919522
Test: acloud-dev create --local-image
Change-Id: Ife131c6570566dbe69c8ce6296b366078b0c5104
4 files changed