[WIP]Make call reusable after leave - 3

[rahul-lohra]

WIP

Goal

1. Allow a Call instance to be safely re-joined after call.leave()
2. Split the Call class into clear, single-purpose responsibilities

Expected Behavior

call.leave()  // Returns immediately, cleanup starts in background
call.leave() // should await for previous cleanup. And If cleanup is already done then skip it
call.join()   // Waits for cleanup, then joins ✅

call.leave()  // Returns immediately, cleanup starts in background  
call.join()   // Waits for cleanup, then joins ✅

call.leave()  // Returns immediately, cleanup completes
// No more joins, Call is cleaned up ✅

Implementation

Safe Re-join After call.leave()

1. Cleanup triggered via call.leave() is serialized:
   • If a cleanup is already in progress, subsequent leave() calls wait for it.
   • If cleanup is already completed, repeated leave() calls are no-ops.

• call.join() always waits for cleanup to complete before proceeding.
• Call-scoped coroutines are re-initialized only during call.join(), and only after cleanup has finished.

This guarantees deterministic behavior across:
• leave → leave → join
• leave → join
• repeated leave calls

Call Refactor

The Call class has been decomposed into the following focused components:

1. CallApiDelegate
2. CallEventManager
3. CallLifecycleManager
4. CallSessionManager
5. CallConnectivityMonitor
6. CallIceConnectionMonitor
7. CallJoinCoordinator
8. CallNetworkSubscriptionController
9. CallReInitializer
10. CallRenderer
11. CallMediaManager
12. CallRenderer
13. CallStatsReporter

[github-actions]

PR checklist ❌

The following issues were detected:

• Missing required label: at least one label starting with pr:.
• Section Goal is missing or empty.
• Section Implementation is missing or empty.
• Section Testing is missing or empty.

What we check

1. Title is concise (5–18 words) unless labeled pr:ignore-for-release.
2. At least one pr: label exists (e.g., pr:bug, pr:new-feature).
3. Sections ### Goal, ### Implementation, and ### Testing contain content.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-video-android-core	11.96 MB	11.99 MB	0.03 MB	🟢
stream-video-android-ui-xml	5.68 MB	5.68 MB	0.00 MB	🟢
stream-video-android-ui-compose	6.27 MB	6.27 MB	0.00 MB	🟢