veyron/services/mgmt/device: Re-enable testDeviceManager

This change re-enables testDeviceManager so that self-updates will
verify that the new device manager binary will at least run.

When the device manager detects when it was started by another device
manager, it assumes that it is for testing purposes only and the only
allowed request is "device".Stop().

Change-Id: Idf762a6407f638f20d0c33c232a09df76adf0fe0
7 files changed
tree: 74db3baf9953321edd9a7e61f3a8d2a09c825c9d
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/