Create the path for specifying combining rules in the subtype

Also add the skeleton of the combining rules for Myanmar
reordering as a pilot.

Bug: 13945569
Change-Id: Iabeb6838f45f1efff482143595ce5b48543e0c43
diff --git a/java/res/xml/method.xml b/java/res/xml/method.xml
index 0156996..2adc957 100644
--- a/java/res/xml/method.xml
+++ b/java/res/xml/method.xml
@@ -503,7 +503,7 @@
             android:subtypeId="0xea266ea4"
             android:imeSubtypeLocale="my_MM"
             android:imeSubtypeMode="keyboard"
-            android:imeSubtypeExtraValue="KeyboardLayoutSet=myanmar,EmojiCapable"
+            android:imeSubtypeExtraValue="KeyboardLayoutSet=myanmar,EmojiCapable,CombiningRules=MyanmarReordering"
             android:isAsciiCapable="false"
     />
     <subtype android:icon="@drawable/ic_ime_switcher_dark"