Until I fixed this, we would fail this example:
$ adb shell sh -c 'echo hello; echo world'
hello
/system/bin/sh: echo world: not found
Bug: http://b/19734868
Change-Id: I11a437cd0c0362303028f23fbaa103611b75707e
* Check the current adb user to choose the order of root/unroot.
* Re-root the device when finished.
Change-Id: I47a14b89e2c405bd63722e4d2043fcc629fb5e58
In practice testing all connected devices is a pain, since it's
probably each device is running a different build. It would probably
make sense to just move this functionality up into a higher level test
runner (which could just live in main).
Also rename test_devices to test_shell, since it doesn't really test
`adb devices`.
Change-Id: Ie96d3e83b30acfac4e3bcbd9821690c0ad4d2f7e
