feat: add Braze 39 kit

[denischilik]

Background

Adds Braze 39 kit by copying braze-38 and updating SDK dependency to com.braze:android-sdk-ui:39.0.0.

What Has Changed

• Copied braze-38 kit to braze-39
• Updated path references (braze-38 → braze-39)
• Registered braze-39 in settings-kits.gradle
• Updated Braze SDK dependency to 39.0.0

Screenshots/Video

N/A

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

Two commits: (1) copy kit + register; (2) update SDK dependency.

Reference Issue (For employees only. Ignore if you are an outside contributor)

• Closes https://rokt.atlassian.net/browse/SDKE-1007

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
29.2% Duplication on New Code (required ≤ 3%)
C Security Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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