Add a host-side test to verify run-as works in adb shell.

Currently it is impossible to debug C++ applications on some devices
without taking special measures. To prevent this from happening in the
future, we'll add some CTS tests that cover the functionality necessary
for debugging C++ code.

Change-Id: I37d339a8d74c7c4fef4fc96f3908b0fa38ad7f0f
6 files changed