sepolicy: Define key for TimeService apk

Define key for TimeService apk.

Change-Id: I612120345bed56fd92d438a0a2db3db6aa919519
diff --git a/Android.mk b/Android.mk
index ff157ef..d4e5b0f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -6,6 +6,7 @@
        $(LOCAL_PATH) \
        $(LOCAL_PATH)/vendor/common \
        $(LOCAL_PATH)/vendor/ssg \
+       $(LOCAL_PATH)/timeservice \
        $(LOCAL_PATH)/vendor/common/sysmonapp
 
 ifeq ($(TARGET_SEPOLICY_DIR),)