To reproduce:
1. Open the attached project "WebCamTest.zip" and open "SampleScene.unity" scene
2. Build for iOS
3. Deploy the Xcode project to an iOS device
4. When the Camera permission request popups up press Don't Allow button
5. Restart the App

Expected result: the pop up is not shown on the first open of the app, or it is shown after the app is restarted if the app wasn't given the permission the first time to use the device camera
Actual result: the project still shows how many cameras does the device have even though the permission to use the cameras wasn't given. On the second run of the app, the pop up doesn't show at all.

Reproduced on:
2018.4.10f1 2019.3.0b5 2020.1.0a7

Doesn't reproduce:
2017.4.33f1 2018.2.21f1

Device reproduced on:
- iPhone X iOS 11.3.1

Device doesn't reproduce on:
- VLNQA00263, Google Pixel 3 (Pixel 3), Android 9, CPU: Snapdragon 845, GPU: Adreno (TM) 630

Notes:
- Might be related to case 1160639
- Cant test on 2019.2.1 - 2019.2.7f2 because of this issue: case 1185078
- The app should ask for permission every time it tries to use the device's cameras if it wasn't given, or don't show the request pop up at all if it's not needed
- On 2018.4.0f1 - 2018.4.10f1 getting this issue: case 1160639
- Crashes on 2018.3.0a4 - 2018.3.14f1
- Getting a lot of errors in Xcode on 2018.3.0a1
- On Android, the permission pop up is displayed every time the app is restarted and permission not given