Remove isRecording from constructor

[rlazo]

It's an internal tracker that should not be modified while instantiating.

[google-oss-bot]

	1 Warning
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Generated by 🚫 Danger

[google-oss-bot]

Coverage Report ¹

Affected Products

No changes between base commit (e8495d5) and merge commit (08919b1).

Test Logs

• Merge (08919b1): https://github.com/firebase/firebase-android-sdk/actions/runs/14131461818

1. https://storage.googleapis.com/firebase-sdk-metric-reports/hjOulYO5Pm.html

[github-actions]

Test Results

0 files   -  1 034  0 suites   - 1 034   0s ⏱️ - 34m 55s
0 tests  -  5 872  0 ✅  -  5 850  0 💤  - 22  0 ❌ ±0 
0 runs   - 11 807  0 ✅  - 11 763  0 💤  - 44  0 ❌ ±0 

Results for commit 399c5c5. ± Comparison against base commit e8495d5.

[google-oss-bot]

Size Report ¹

Affected Products

• base

  Type	Base (e8495d5)	Merge (08919b1)	Diff
  apk (aggressive)	?	8.80 kB	? (?)
  apk (release)	?	9.77 kB	? (?)

• firebase-vertexai

  Type	Base (e8495d5)	Merge (08919b1)	Diff
  aar	?	767 kB	? (?)
  apk (aggressive)	?	1.53 MB	? (?)
  apk (release)	?	9.49 MB	? (?)

Test Logs

• Merge (08919b1): https://github.com/firebase/firebase-android-sdk/actions/runs/14131461818

1. https://storage.googleapis.com/firebase-sdk-metric-reports/9HmCVQlb89.html