SyncManager throws "there is already a sync with name" error after re-login

[abhinavRepo26]

Description:
When a user logs out and logs back into the app, attempting to create syncs with the same names fails with the error:
com.salesforce.androidsdk.mobilesync.manager.SyncManager$MobileSyncException: Failed to create sync down: there is already a sync with name: [SyncName]

Expected Behavior:

1. Sync definitions should be cleared/cleaned up during logout
2. OR SyncManager should handle re-registration of syncs with same names after re-login
3. OR Provide a clean API to reset sync state for a new user session

Actual Behavior:
Old sync definitions persist in SmartStore's synces soup across user sessions, causing conflicts when trying to create new syncs with identical names.

Reproduction Steps:

1. Login as User A
2. Create syncs (e.g., VisitSyncDown, NotificationSyncDown)
3. Logout
4. Login as User B (or same user)
5. Attempt to create syncs with same names
6. Error occurs

Environment:

• React Native Salesforce Mobile SDK: 13.1.0

[wmathurin]

User stores / user syncs are deleted when the user logs out.
Global stores / global syncs are not deleted when the user logs out. They should only hold global app data - not user / org specific.