Wire up GateKeeper to LockSettingsService

Adds:
- Communication to GKService
- password upgrade flow
- enroll takes previous credential

Change-Id: I0161b64642be3d0e34ff4a9e6e3ca8569f2d7c0a
diff --git a/Android.mk b/Android.mk
index f4b9551..2c04c18 100644
--- a/Android.mk
+++ b/Android.mk
@@ -209,6 +209,7 @@
 	core/java/android/security/IKeystoreService.aidl \
 	core/java/android/service/carrier/ICarrierMessagingCallback.aidl \
 	core/java/android/service/carrier/ICarrierMessagingService.aidl \
+	core/java/android/service/gatekeeper/IGateKeeperService.aidl \
 	core/java/android/service/notification/INotificationListener.aidl \
 	core/java/android/service/notification/IStatusBarNotificationHolder.aidl \
 	core/java/android/service/notification/IConditionListener.aidl \