Attempt to prevent message retry loops.

app/src/main/java/org/thoughtcrime/securesms/jobmanager/JobController.java

@@ -76,6 +76,15 @@ class JobController {
     notifyAll();
   }
 
+  @WorkerThread
+  void submitNewJobChains(@NonNull List<List<List<Job>>> chains) {
+    synchronized (this) {
+      for (List<List<Job>> chain : chains) {
+        submitNewJobChain(chain);
+      }
+    }
+  }
+
   @WorkerThread
   void submitNewJobChain(@NonNull List<List<Job>> chain) {
     synchronized (this) {

app/src/main/java/org/thoughtcrime/securesms/jobmanager/JobManager.java

@@ -35,6 +35,7 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
 /**
  * Allows the scheduling of durable jobs that will be run as early as possible.
@@ -208,6 +209,24 @@ public class JobManager implements ConstraintObserver.Notifier {
     });
   }
 
+  public void addAllChains(@NonNull List<JobManager.Chain> chains) {
+    if (chains.isEmpty()) {
+      return;
+    }
+
+    for (Chain chain : chains) {
+      for (List<Job> jobList : chain.getJobListChain()) {
+        for (Job job : jobList) {
+          jobTracker.onStateChange(job, JobTracker.JobState.PENDING);
+        }
+      }
+    }
+
+    runOnExecutor(() -> {
+      jobController.submitNewJobChains(chains.stream().map(Chain::getJobListChain).collect(Collectors.toList()));
+    });
+  }
+
   /**
    * Begins the creation of a job chain with a single job.
    * @see Chain