Fix flaky test

[linsang21]

ℹ️ Description

• Fix flaky unit test
• Skip BGBlur instrument tests, which requires real device to test (hasn't set up in github action)

  Issue #, if available

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update
  • [ ] README update
  • [ ] CHANGELOG update
  • [ ] guides update
• [ ] This change requires a dependency update
  • [ ] Amazon Chime SDK Media
  • [ ] Other (update corresponding legal documents)

🧪 How Has This Been Tested?

tested locally

Unit test coverage

• Class coverage:
• Line coverage:

Additional Manual Test

• [ ] Pause and resume remote video
• [ ] Switch local camera
• [ ] Rotate screen back and forth

📱 Screenshots, if available

provide screenshots/video record if there's a UI change in demo app

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[georgezy-amzn]

Let's track this task: Skip BGBlur instrument tests, which requires real device to test (hasn't set up in github action) Also, I can see the changes are more readable, but how does it fix the flaky tests?

[linsang21]

Let's track this task: Skip BGBlur instrument tests, which requires real device to test (hasn't set up in github action) Also, I can see the changes are more readable, but how does it fix the flaky tests?

Not 100% sure why, I suspect the original nested stream operations has some concurrency issue.