split-select: Fix rules generated for anydpi density

Change-Id: I9de569ca9a76eb22df4d0e178df847ba1c7d0b01
diff --git a/tools/split-select/Rule.h b/tools/split-select/Rule.h
index 8029931..08a2075 100644
--- a/tools/split-select/Rule.h
+++ b/tools/split-select/Rule.h
@@ -28,6 +28,7 @@
 
 struct Rule : public virtual android::RefBase {
     inline Rule();
+    Rule(const Rule& rhs);
 
     enum Operator {
         LESS_THAN = 1,