Android: Add support for Traditional Chinese (HK) (#6061)

platform/android/java/res/values-zh-rHK/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="godot_project_name_string">godot-project-name-zh_HK</string>
+</resources>