Added tests for latin smart dial map.

Bug: 30215380
Test: this CL
PiperOrigin-RevId: 179461976
Change-Id: I05dc2ddde58533ef2caef7ccd3327d36c7bf4e55
diff --git a/java/com/android/dialer/smartdial/LatinSmartDialMap.java b/java/com/android/dialer/smartdial/LatinSmartDialMap.java
index c512c5d..656fd12 100644
--- a/java/com/android/dialer/smartdial/LatinSmartDialMap.java
+++ b/java/com/android/dialer/smartdial/LatinSmartDialMap.java
@@ -16,6 +16,7 @@
 
 package com.android.dialer.smartdial;
 
+/** {@link SmartDialMap} for Latin based T9 dialpad searching. */
 public class LatinSmartDialMap implements SmartDialMap {
 
   private static final char[] LATIN_LETTERS_TO_DIGITS = {