Add the rtl attribute to Arabic/Hebrew keyboards

A follow up to I18b9962c

bug: 5047217
Change-Id: Iea72182a80e69b2a631f23b825430ebfbfc2f560
diff --git a/java/res/xml-ar/kbd_qwerty.xml b/java/res/xml-ar/kbd_qwerty.xml
index 57a6d2c..b26a938 100644
--- a/java/res/xml-ar/kbd_qwerty.xml
+++ b/java/res/xml-ar/kbd_qwerty.xml
@@ -21,6 +21,7 @@
 <Keyboard
     xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
     latin:keyboardLocale="ar"
+    latin:isRtlKeyboard="true"
 >
     <include
         latin:keyboardLayout="@xml/kbd_rows_arabic" />