initial commit of acloud for open sourcing

The Cloud Android Driver Binaries (namely, acloud) in this project
provide the standard APIs to access and control Cloud Android devices
(i.e., Android Virtual Devices on Google Compute Engine) instantiated
by using the Android source code (e.g., device/google/gce* projects).

No code change required in the initial commit which is to track
all the changes submitted after the initial commit.
Unit tests are not part of this initial commit and thus will be
submitted as the second commit due to their current dependencies

Test: no build rule defined for python yet
Change-Id: Ib6aaadf33fa110f4532ba2d5b7be91e8ddc632a9