tree 245f36ae41f95e64faca59401ff6ccc0394d9c76
parent e428f624653bd0b6f66e8d4c95f54f6e90fc6218
author Doug Zongker <dougz@android.com> 1378327478 -0700
committer Doug Zongker <dougz@android.com> 1378332149 -0700

allow CheckKey to request mounting /system

Also provide a default implementation of CheckKey that's reasonable
for many devices (those that have power and volume keys).

Change-Id: Icf6c7746ebd866152d402059dbd27fd16bd51ff8