Revert "Revert "Align hint label to bottom""

This reverts commit 02c4a80afea802859c5cb4d1033a7374c3132c96.
diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 8b3687a..bfe3856 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -292,6 +292,7 @@
         <!-- The key label flags. -->
         <attr name="keyLabelFlags" format="integer">
             <!-- This should be aligned with Key.LABEL_FLAGS__* -->
+            <flag name="alignHintLabelToBottom" value="0x02" />
             <flag name="alignIconToBottom" value="0x04" />
             <flag name="alignLabelOffCenter" value="0x08" />
             <flag name="fontNormal" value="0x10" />