Support encryption, avoid double __unserialize call

Laravel uses the magic method `__unserialize()` in the `SerializesModels` trait, which does a bunch of work to rehydrate models attached to jobs. This gets called every time the job is unserialized. The addition of an `unserialize()` call in the constructor to get the `queue` property causes it to run twice because of the original call to `unserialize()` is in `\Illuminate\Queue\CallQueuedHandler->getCommand()`.

`CallQueuedHandler->getCommand()` also implements support for encrypted command payloads.

This change brings over the encryption support logic from `CallQueuedHandler->getCommand()` and passed `['allowed_classes' => false]` to the `unserialize()` call. This will make it _not_ hydrate to the original job object, but instead to an instance of `__PHP_Incomplete_Class` avoiding the unnecessary call to `__unserialize()` with this `unserialize()` call. We then cast to an `(array)` to access the `queue` property without issue.

Author: dshafik

src/CloudTasksJob.php

@@ -24,9 +24,13 @@ public function __construct(array $job, CloudTasksQueue $cloudTasksQueue)
         $this->job = $job;
         $this->container = Container::getInstance();
         $this->cloudTasksQueue = $cloudTasksQueue;
-        /** @var \stdClass $command */
-        $command = unserialize($job['data']['command']);
-        $this->queue = $command->queue;
+        
+        if (Str::startsWith($job['data']['command'], 'O:')) {
+            $command = (array) unserialize($job['data']['command'], ['allowed_classes' => false]);
+        } elseif ($this->container->bound(Encrypter::class)) {
+            $command = (array) unserialize($this->container[Encrypter::class]->decrypt($job['data']['command']), ['allowed_classes' => false]);
+        }
+        $this->queue = $command['queue'];
     }
 
     public function getJobId(): string