move event log tags used by system server into this package

We can now locate event log tag definitions in individual packages
(and java constants for the tag numbers get auto-generated), so move
all the tags used by the system server into the package.
diff --git a/services/java/Android.mk b/services/java/Android.mk
index 5e912d6..5c54e33 100644
--- a/services/java/Android.mk
+++ b/services/java/Android.mk
@@ -5,7 +5,8 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := \
-            $(call all-subdir-java-files)
+            $(call all-subdir-java-files) \
+	    com/android/server/EventLogTags.logtags
 
 LOCAL_MODULE:= services