Start group call without net lead to crash

[Kobayashi-996]

Guidelines

• I have searched searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

Bug description

Starting a group call when the net is off lead the app crash.

Steps to reproduce

1. Enter the app
   (Build or Enter a group)
2. More options
3. New group
4. Skip
5. Enter a group name
6. Create
7. Close the flow window
   (Main Trigger flow)
8. Open Airplane mode (close network)
9. Enter group profile
10. Video
11. Cancel
12. Video
    The app crash.

Stack trace

FATAL EXCEPTION: pool-40-thread-1
Process: org.thoughtcrime.securesms, PID: 17379
java.lang.AssertionError: Unable to create group call client
at org.signal.ringrtc.GroupCall.create(GroupCall.java:159)
at org.signal.ringrtc.CallManager.createGroupCall(CallManager.java:1252)
at org.thoughtcrime.securesms.service.webrtc.GroupPreJoinActionProcessor.handlePreJoinCall(GroupPreJoinActionProcessor.java:49)
at org.thoughtcrime.securesms.service.webrtc.IdleActionProcessor.handlePreJoinCall(IdleActionProcessor.java:90)
at org.thoughtcrime.securesms.service.webrtc.SignalCallManager.lambda$startPreJoinCall$1(SignalCallManager.java:232)
at org.thoughtcrime.securesms.service.webrtc.SignalCallManager$$ExternalSyntheticLambda7.process(D8$$SyntheticClass:0)
at org.thoughtcrime.securesms.service.webrtc.SignalCallManager.lambda$process$0(SignalCallManager.java:211)
at org.thoughtcrime.securesms.service.webrtc.SignalCallManager.$r8$lambda$s7jZ5qAaqdaNwJjDQSUaDVOqJks(Unknown Source:0)
at org.thoughtcrime.securesms.service.webrtc.SignalCallManager$$ExternalSyntheticLambda26.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

Screenshots

Screen_recording_20250207_164329.mp4

Device

Pixel2 & Pixel8 pro

Android version

Android 9 & Android 13

Signal version

7.32.2

Link to debug log

https://debuglogs.org/android/7.32.2/e00a10f9af18dfef1b6a5f9bd57117cb294af95704de976428eb8fe215d6e16b