fix formatting

Author: My Name

firebase-messaging/src/main/java/com/google/firebase/messaging/SyncTask.java

@@ -35,9 +35,7 @@
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-/**
- * Background task to perform sync operations with the Firebase backend using a bg thread
- */
+/** Background task to perform sync operations with the Firebase backend using a bg thread */
 class SyncTask implements Runnable {
 
   private final long nextDelaySeconds;
@@ -115,9 +113,9 @@ public void run() {
    * Refreshes the token if needed
    *
    * @return {@code true} if successful, {@code false} if needs to be rescheduled.
-   * @throws IOException on a hard failure that should not be retried. Hard failures are
-   *     failures except {@link GmsRpc#ERROR_SERVICE_NOT_AVAILABLE} and
-   *     {@link GmsRpc#ERROR_INTERNAL_SERVER_ERROR}
+   * @throws IOException on a hard failure that should not be retried. Hard failures are failures
+   *     except {@link GmsRpc#ERROR_SERVICE_NOT_AVAILABLE} and {@link
+   *     GmsRpc#ERROR_INTERNAL_SERVER_ERROR}
    */
   @VisibleForTesting
   boolean maybeRefreshToken() throws IOException {
@@ -162,10 +160,8 @@ boolean isDeviceConnected() {
   @VisibleForTesting
   static class ConnectivityChangeReceiver extends BroadcastReceiver {
 
-    @Nullable
-    private SyncTask task; // task is set to null after it has been fired.
-    @Nullable
-    private Context context;
+    @Nullable private SyncTask task; // task is set to null after it has been fired.
+    @Nullable private Context context;
 
     public ConnectivityChangeReceiver(SyncTask task) {
       this.task = task;
@@ -176,8 +172,10 @@ public void registerReceiver() {
         Log.d(TAG, "Connectivity change received registered");
       }
       IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
-      context = task.getContext();
-      context.registerReceiver(this, intentFilter);
+      if (task != null) {
+        context = task.getContext();
+        context.registerReceiver(this, intentFilter);
+      }
     }
 
     @Override
@@ -197,8 +195,8 @@ public void onReceive(Context context, Intent intent) {
         Log.d(TAG, "Connectivity changed. Starting background sync.");
       }
       task.firebaseMessaging.enqueueTaskWithDelaySeconds(task, 0);
-      if (context != null) {
-        context.unregisterReceiver(this);
+      if (this.context != null) {
+        this.context.unregisterReceiver(this);
         task = null;
       }
     }