Fix FIAM API Definition (firebase#1873)

Author: JasonAHeron

firebase-inappmessaging/api.txt

@@ -4,6 +4,8 @@ package com.google.firebase.inappmessaging {
  public class FirebaseInAppMessaging {
  method public void addClickListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingClickListener);
  method public void addClickListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingClickListener, @NonNull java.util.concurrent.Executor);
+ method public void addDismissListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingDismissListener);
+ method public void addDismissListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingDismissListener, @NonNull java.util.concurrent.Executor);
  method public void addDisplayErrorListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingDisplayErrorListener);
  method public void addDisplayErrorListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingDisplayErrorListener, @NonNull java.util.concurrent.Executor);
  method public void addImpressionListener(@NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingImpressionListener);
@@ -30,6 +32,10 @@ package com.google.firebase.inappmessaging {
  method @NonNull public String getTriggerName();
  }
 
+ public interface FirebaseInAppMessagingDismissListener {
+ method public void messageDismissed(@NonNull com.google.firebase.inappmessaging.model.InAppMessage);
+ }
+
  @Keep public interface FirebaseInAppMessagingDisplay {
  method @Keep public void displayMessage(@NonNull com.google.firebase.inappmessaging.model.InAppMessage, @NonNull com.google.firebase.inappmessaging.FirebaseInAppMessagingDisplayCallbacks);
  }