Enable long-press digit input for tablets

Bug: 6632204
Change-Id: I8a62e78367c87c2fbb8f14575aef98035fa8440e
diff --git a/java/res/xml/rowkeys_thai2.xml b/java/res/xml/rowkeys_thai2.xml
index f602994..4bcbbbf 100644
--- a/java/res/xml/rowkeys_thai2.xml
+++ b/java/res/xml/rowkeys_thai2.xml
@@ -79,9 +79,13 @@
                 latin:keyLabel="," />
         </case>
         <default>
-            <!-- U+0E46: "ๆ" THAI CHARACTER MAIYAMOK -->
+            <!-- U+0E46: "ๆ" THAI CHARACTER MAIYAMOK
+                 U+0E50: "๐" THAI DIGIT ZERO -->
             <Key
                 latin:keyLabel="&#x0E46;"
+                latin:keyHintLabel="0"
+                latin:additionalMoreKeys="0"
+                latin:moreKeys="&#x0E50;"
                 latin:keyLabelFlags="fontNormal" />
             <!-- U+0E44: "ไ" THAI CHARACTER SARA AI MAIMALAI -->
             <Key