Update scheduling of ServiceOutageDetectionJob.

Previously, we were running this job in PushSendJob#onCanceled().
However, with the new retry logic, this won't happen for 24 hours.

Instead, we now schedule the job in PushSendJob#onRetry().

src/org/thoughtcrime/securesms/jobs/PushGroupSendJob.java

@@ -139,8 +139,6 @@ public class PushGroupSendJob extends PushSendJob implements InjectableType {
 
   @Override
   public void onCanceled() {
-    super.onCanceled();
-
     DatabaseFactory.getMmsDatabase(context).markAsSentFailed(messageId);
   }
 

src/org/thoughtcrime/securesms/jobs/PushMediaSendJob.java

@@ -94,8 +94,6 @@ public class PushMediaSendJob extends PushSendJob implements InjectableType {
 
   @Override
   public void onCanceled() {
-    super.onCanceled();
-
     DatabaseFactory.getMmsDatabase(context).markAsSentFailed(messageId);
     notifyMediaMessageDeliveryFailed(context, messageId);
   }

src/org/thoughtcrime/securesms/jobs/PushSendJob.java

@@ -74,9 +74,13 @@ public abstract class PushSendJob extends SendJob {
   }
 
   @Override
-  public void onCanceled() {
+  public void onRetry() {
+    super.onRetry();
+
+    if (getRunIteration() > 1) {
       ApplicationContext.getInstance(context).getJobManager().add(new ServiceOutageDetectionJob(context));
     }
+  }
 
   protected Optional<byte[]> getProfileKey(@NonNull Recipient recipient) {
     if (!recipient.resolve().isSystemContact() && !recipient.resolve().isProfileSharing()) {

src/org/thoughtcrime/securesms/jobs/PushTextSendJob.java

@@ -83,8 +83,6 @@ public class PushTextSendJob extends PushSendJob implements InjectableType {
 
   @Override
   public void onCanceled() {
-    super.onCanceled();
-
     DatabaseFactory.getSmsDatabase(context).markAsSentFailed(messageId);
 
     long      threadId  = DatabaseFactory.getSmsDatabase(context).getThreadIdForMessage(messageId);