Logic to move phone into security-admin mode

* Create notification to display when syncs fail due to security
* Create psuedo-activity (no UI) to manage device admin state transitions
* Clean up and flesh out SecurityPolicy APIs'
* Add placeholders in EasSyncService showing how to react when policies
    are not met and sync cannot continue.

Note:  There are some STOPSHIP todo's at the top of SecurityPolicy.java.
These should explain any code that you might think is "missing".
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 76ff915..8eaa175 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -115,6 +115,11 @@
             android:label="@string/account_settings_action"
             >
         </activity>
+        <activity
+            android:name=".activity.setup.AccountSecurity"
+            android.label="@string/account_security_title"
+            >
+        </activity>
 
         <activity
             android:name=".activity.Debug"