[Telecom-5] use Telecom-first incoming calls on Android 17

[rahul-lohra]

Goal

Closes: #[AND-1494]

Implementation

• default Android 17 incoming calls to Telecom-first routing using isAndroid17OrHigher()
• post the notification-owned ringing UI only after Telecom registration succeeds
• fall back to CallService while retaining notification ringtone ownership
• keep pre-Android 17 behavior unchanged
• keep one ServiceLauncher and Telecom provider per client lifecycle
• track whether Telecom or CallService owns the incoming call
• leave ClientState.maybeStopForegroundService(call) unchanged from the preceding PR

Public API changes

• None. The temporary debugUseTelecomFirstForIncomingCalls builder API was removed.
• Telecom routing state and coordinator types remain internal.

Stack

PR 5 of 5. Depends on #1810.

Review and merge the stack from #1807 upward.

Testing

• both Android 17 and pre-Android 17 incoming-call coordinators
• notification ringtone preparation, existing-channel reuse, and missing-channel rejection
• notification-only incoming-call presentation
• Telecom permission checks and registration callbacks, failures, and cancellation
• Android-version defaults in CallServiceConfig
• CallService observer ownership for Telecom and legacy routes
• foreground-service type behavior across Android versions
• Telecom notification update IDs
• legacy ringtone suppression under notification ownership
• rejected-call handling
• incoming notification preparation and missed-call cleanup in StreamDefaultNotificationHandler

[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	12.30 MB	12.32 MB	0.02 MB	🟢
stream-video-android-ui-xml	5.70 MB	5.69 MB	-0.00 MB	🚀
stream-video-android-ui-compose	6.23 MB	6.23 MB	0.00 MB	🟢

[sonarqubecloud]

Quality Gate failed

Failed conditions
71.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud