WIP - Notification trigger API

Author: lfkellogg

firebase-appdistribution-api/src/main/java/com/google/firebase/appdistribution/FirebaseAppDistribution.java

@@ -14,9 +14,11 @@
 
 package com.google.firebase.appdistribution;
 
+import android.app.NotificationChannel;
 import android.net.Uri;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.app.NotificationCompat;
 import com.google.android.gms.tasks.Task;
 import com.google.firebase.FirebaseApp;
 import com.google.firebase.appdistribution.internal.FirebaseAppDistributionProxy;
@@ -179,6 +181,29 @@ public interface FirebaseAppDistribution {
    */
   void startFeedback(@NonNull CharSequence infoText, @Nullable Uri screenshot);
 
+  /**
+   * Displays a notification that, when tapped, will take a screenshot of the current activity, then
+   * start a new activity to collect and submit feedback from the tester along with the screenshot.
+   *
+   * <p>When the notification is tapped:
+   *
+   * <ol>
+   *   <li>If the app is open, take a screenshot of the current activity
+   *   <li>If tester is not signed in, presents the tester with a Google Sign-in UI
+   *   <li>Starts a full screen activity for the tester to compose and submit the feedback
+   * </ol>
+   *
+   * <p>On platforms O and above, the notification will be created in its own notification channel.
+   *
+   * @param infoTextResourceId string resource ID of text to display to the tester before collecting
+   *     feedback data (e.g. Terms and Conditions)
+   * @param importance the amount the user should be interrupted by notifications from the feedback
+   *     notification channel. See {@link NotificationChannel#setImportance}. On platforms below O,
+   *     the importance will be translated into a comparable notification priority (see {@link
+   *     NotificationCompat.Builder#setPriority}).
+   */
+  void showFeedbackNotification(@NonNull int infoTextResourceId, int importance);
+
   /** Gets the singleton {@link FirebaseAppDistribution} instance. */
   @NonNull
   static FirebaseAppDistribution getInstance() {