fixed executor test (#4881)

Author: stefanosiano

sentry/src/test/java/io/sentry/SentryExecutorServiceTest.kt

@@ -225,8 +225,11 @@ class SentryExecutorServiceTest {
       future.cancel(true)
     }
     assertEquals(1000, executor.queue.size)
+
     // Submit should purge cancelled scheduled jobs
     sentryExecutor.submit {}
-    assertEquals(1, executor.queue.size)
+    // The queue size should be 1, but if the executor thread runs right before we check the size,
+    // it returns 0
+    assertTrue(executor.queue.size < 2)
   }
 }