DO NOT MERGE Replacement sample code for DevicePolicyManager api.

* UI is organized into multiple screens to make it easier to understand
* More feedback about local vs global (aggregate) policies
* Uses preference fragments for modern appearance

Backport of: I075161d389942786e6c95483becbff7ebe847078

Change-Id: Ie88c1577b2ebae124615cc4b45968851cf11187e
10 files changed