TestWorkflowEnvironment schedules the first activity retry immediately

Expected Behavior

With a retry policy like:

      RetryOptions.newBuilder()
          .setInitialInterval(Duration.ofSeconds(10))
          .setBackoffCoefficient(2.0)
          .build();

I would expect delays of 10, 20, 40, 80, so attempts (including the first one) run at T0, 10, 30, 70, 150.

Actual Behavior

Attempts run at T0, 0, 10, 30, 70 - the first retry gets scheduled immediately.

Steps to Reproduce the Problem

Check out https://github.com/nagl-stripe/sdk-java/commit/b4f764dfdc22102893be1916b325a40322ccd54e - it has a test case that would pass if the actual behavior were the expected behavior

This is very much not-urgent =)

Specifications

• Version: latest
• Platform: TestWorkflowEnviornment

Bắt đầu với test case trong commit b4f764dfdc22102893be1916b325a40322ccd54e và kiểm tra cách TestWorkflowEnvironment lên lịch các lần retry activity. Tái hiện chính sách retry với các độ trễ 10, 20, 40 và 80 giây, sau đó xác minh rằng các lần thử diễn ra tại T0, 10, 30, 70 và 150 thay vì retry ngay lập tức.