Add the cancel button handler

Step 3

Bug: 5306641
Change-Id: Ida4ccf181942714799576fde0ac55596ce043434
diff --git a/proguard.flags b/proguard.flags
index 6d41d17..a07b2ec 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -12,3 +12,7 @@
 -keep class com.android.settings.accounts.*
 -keep class com.android.settings.fuelgauge.*
 
+# Keep click responders
+-keepclassmembers class com.android.settings.inputmethod.UserDictionaryAddWordActivity {
+  *** onClick*(...);
+}