RUMM-2769 Fix NPE in ScreenRecorder when wrapping a null window.callback

[mariusc83]

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• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
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[0xnm]

minor: we can use lambda syntax with captor == this

argumentCaptor<Window.Callback>() {
   ...
}

[mariusc83]

I find it a bit unreadable for me that way :). That's the reason I prefer to non-lambda way.

[codecov-commenter]

Codecov Report

Merging #1164 (bbd794f) into feature/sdkv2 (7fdd524) will decrease coverage by 0.09%.
The diff coverage is 51.52%.

@@                Coverage Diff                @@
##           feature/sdkv2    #1164      +/-   ##
=================================================
- Coverage          82.33%   82.25%   -0.09%     
=================================================
  Files                352      353       +1     
  Lines              11813    11839      +26     
  Branches            2012     2015       +3     
=================================================
+ Hits                9726     9737      +11     
- Misses              1461     1481      +20     
+ Partials             626      621       -5     

Impacted Files	Coverage Δ
...droid/sessionreplay/recorder/NoOpWindowCallback.kt	6.25% <6.25%> (ø)
...g/android/sessionreplay/recorder/ScreenRecorder.kt	94.12% <94.12%> (+2.45%)	⬆️
...android/log/internal/logger/TelemetryLogHandler.kt	85.71% <0.00%> (-14.29%)	⬇️
...src/main/kotlin/com/datadog/android/DatadogSite.kt	83.33% <0.00%> (-3.33%)	⬇️
...ndroid/telemetry/internal/TelemetryEventHandler.kt	69.17% <0.00%> (-2.50%)	⬇️
...ain/java/com/datadog/opentracing/PendingTrace.java	58.62% <0.00%> (-0.86%)	⬇️
...rc/main/java/com/datadog/opentracing/DDTracer.java	55.65% <0.00%> (-0.84%)	⬇️
...android/rum/internal/ndk/DatadogNdkCrashHandler.kt	87.19% <0.00%> (ø)
...android/v2/core/internal/DatadogContextProvider.kt	81.54% <0.00%> (ø)
...android/v2/core/internal/net/DataOkHttpUploader.kt	94.52% <0.00%> (ø)
... and 8 more