chore: update Intercom SDK dependencies (Android: 18.3.0 → 18.3.1)

[imSzukala]

🔄 Intercom SDK Dependency Update

Prepares the next RN release. Modeled on #448.

📋 Changes Made:

• Updated Android SDK from 18.3.0 to 18.3.1
• iOS SDK unchanged — already at the latest (19.6.3)
• Bumped version from 10.3.2 to 10.3.3 (patch)

📚 Release Notes:

🤖 Android SDK 18.3.1

View Release Notes

###### Release Date: 23-06-2026

### 🐛 Bug Fixes
* Fixed a crash when selecting multiple photos to upload from a Messenger form
* Fixed attribute collectors not appearing in Android conversations
* Fixed a crash caused by push-notification image loading running on the main thread
* Restored the `ThemeMode` enum and `ui` package to the published artifact, so theme customization works as documented
* Fixed Fin reply links rendering with unreadable, low-contrast text

### 👉 Dependency updates
* Firebase Messaging: Updated to 25.1.0

📝 Notes

• Version bumped as a patch (10.3.3): this round is bug-fixes-only on a single platform. chore: update Intercom SDK dependencies (iOS: 19.6.0 → 19.6.3, Android: 18.2.0 → 18.3.0) #448 was a minor bump because it carried a minor Android feature release.
• Podfile.lock files are left untouched — the iOS Intercom pod is unchanged, and lock files are regenerated by pod install on CI.

~ Automated via Claude

🤖 Generated with Claude Code