Android and iOS video issues

[mcblacksea]

Issue prerequisites

---

Used TestSample project

All functionality in the TestSample according to latest PR #36, for this time (26th of August 2022)

Tested on real device:
Android: Huawei P20 pro iOS: iPhone 12 Pro And web browser app: .Net Core + React edition: communication-services-web-calling-hero

Call mode (or TypeCall): Group call

Issues description

---

1. On iOS: when user is pressing the 'Turn On / Off' Video button several times (2-3 in my case) along the call, then app crashes, without any exception handling or some pop up notification for the user.

2. On iOS and Android: The Camera switching (Back / Front camera) button is not working along the Video call

3. On Android: when user is pressing the 'Turn On / Off' Video button several times, the video on the frame with current (Android) caller is disappearing, and current user (or Android caller) instead of himself (or his current video within the current user's frame) just seeing the blank frame.

4. On Android: when user is joining to the Group call and turning ON the video, in order to check if everything is alright before the call, on the Setup page, then when he entered into the Call Page, he won't see the frame with himself (or with Android caller). The frame with Android user caller appears on his phone only when he pushes back and forth 'Turn On / Off' Video button, but not at the beginning of the call as expected.