Clicking away on share app crashed the app

[teolemon]

What

• Clicking away on share app crashed the app

Steps to reproduce the behavior

1. Go to Settings >> Share app
2. Click on it
3. Click in the void above the bottom sheet
4. See crash.

[g123k]

This is actually the scanner that is crashing (juliansteenbakker/mobile_scanner#666):

E/AndroidRuntime(29943): FATAL EXCEPTION: main
E/AndroidRuntime(29943): Process: org.openfoodfacts.scanner, PID: 29943
E/AndroidRuntime(29943): java.lang.NullPointerException
E/AndroidRuntime(29943): 	at dev.steenbakker.mobile_scanner.MobileScanner.start$lambda$11$lambda$6(MobileScanner.kt:172)
E/AndroidRuntime(29943): 	at dev.steenbakker.mobile_scanner.MobileScanner.$r8$lambda$6xiYqBKE4NOIEBpF_EUVJP0DW6M(Unknown Source:0)
E/AndroidRuntime(29943): 	at dev.steenbakker.mobile_scanner.MobileScanner$$ExternalSyntheticLambda3.onSurfaceRequested(Unknown Source:4)
E/AndroidRuntime(29943): 	at androidx.camera.core.Preview.lambda$sendSurfaceRequest$1(Preview.java:516)
E/AndroidRuntime(29943): 	at androidx.camera.core.Preview$$ExternalSyntheticLambda2.run(Unknown Source:4)
E/AndroidRuntime(29943): 	at android.os.Handler.handleCallback(Handler.java:942)
E/AndroidRuntime(29943): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(29943): 	at android.os.Looper.loopOnce(Looper.java:201)
E/AndroidRuntime(29943): 	at android.os.Looper.loop(Looper.java:288)
E/AndroidRuntime(29943): 	at android.app.ActivityThread.main(ActivityThread.java:7918)
E/AndroidRuntime(29943): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(29943): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
E/AndroidRuntime(29943): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

[g123k]

I'm able to reproduce the issue in numerous cases.
This happens when you leave/reopen the app on Android and the scanner is not in foreground.

I will create a PR on the official repo and depending, we will see how to merge it.
But for me, this is one is blocking for the release.

[g123k]

PR submitted: juliansteenbakker/mobile_scanner#710