Android: Rename values-zh to values-zh-rCN (#6063)

(cherry picked from commit 4f6a21b0df772804b67073dc65f000f571a4511e)

platform/android/java/res/values-zh/strings.xml → platform/android/java/res/values-zh-rCN/strings.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="godot_project_name_string">godot-project-name-zh</string>
-</resources>
+</resources>