Move to the new stream-android-core 5.1.1

[aleksandar-apostolov]

Goal

Closes AND-1619 — core 5.1.1 is published only to stream-io-repo.com.

Implementation

• streamCore 5.1.0 → 5.1.1.
• dependencyResolutionManagement adds https://stream-io-repo.com, declared last.

🎨 UI Changes

None.

Testing

• ./gradlew :stream-video-android-core:compileDebugKotlin --refresh-dependencies --info: core 5.1.1 404s on Google and Central and resolves from stream-io-repo.com. BUILD SUCCESSFUL.
• CI on this PR resolves the same way.

Summary by CodeRabbit

• Chores
  • Updated the app’s build configuration to use a newer streaming platform release and include its package source. These changes support building the app with the updated platform components; no end-user features or behavior changes are noted in this update.

[github-actions]

PR checklist ✅

All required conditions are satisfied:

• Title length is OK (or ignored by label).
• At least one pr: label exists.
• Sections ### Goal, ### Implementation, and ### Testing are filled, or the PR is bot-authored.
• An issue is linked (Linear ticket or GitHub issue), or the PR is bot-authored.

🎉 Great job! This PR is ready for review.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-video-android-core	12.38 MB	12.68 MB	0.30 MB	🟡
stream-video-android-ui-xml	5.66 MB	5.72 MB	0.06 MB	🟢
stream-video-android-ui-compose	6.19 MB	3.18 MB	-3.01 MB	🚀

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud