Introduce assertj test lib to make the throw exception test more accu…

[phaiting]

Summary

This change introduced the assertj test lib to make the throw exception testing more accurate

Test plan

./gradlew :executorch_android:testDebugUnitTest

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/10779

• 📄 Preview Python docs built from this PR

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❌ 5 New Failures, 11 Pending

As of commit c82c624 with merge base b1b46ee ():

NEW FAILURES - The following jobs have failed:

• pull / test-models-linux (llama3_2_vision_encoder, portable, linux.4xlarge.memory) / linux-job (gh)
  RuntimeError: Command docker exec -t 181d7874bb7165255acf9d13085e9b25ad0174772a0d110330702796c1616b6e /exec failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command docker exec -t d6b868f10db339173bb7bfc1511d98b75f80d93ecce71f50fad6c9adffffbcce /exec failed with exit code 1
• pull / unittest / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 84e3ed0891c184bdfe0f6b6c7d6a832b74214187ad659dcc79238994941e34d5 /exec failed with exit code 1
• pull / unittest-editable / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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[phaiting]

@pytorchbot label "topic: not user facing"

[kirklandsign]

linter

[kirklandsign]

Failures are unrelated.

[kirklandsign]

Thank you! 🚀 🚀