Fix issue where if DataStore.start is called rapidly, an interruption could result in starting sync when it shouldn't

Author: tylerjroach

aws-datastore/src/main/java/com/amplifyframework/datastore/syncengine/SubscriptionProcessor.java

@@ -150,8 +150,9 @@ synchronized void startSubscriptions() throws DataStoreException {
             LOG.debug("Waiting for subscriptions to start.");
             subscriptionsStarted = latch.abortableAwait(adjustedTimeoutSeconds, TimeUnit.SECONDS);
         } catch (InterruptedException exception) {
-            LOG.warn("Subscription operations were interrupted during setup.");
-            return;
+            String errorMessage = "Subscription operations were interrupted during setup.";
+            LOG.warn(errorMessage);
+            throw new DataStoreException(errorMessage, "Retry");
         }
 
         if (subscriptionsStarted) {