A Carbon app is not inspectable with the Layout Inspector

[jlauridsen]

Steps to reproduce:

1. Run the sample Carbon application on an API 33 emulator
2. In Android Studio: Open the Layout Inspector and connect to the app
3. Select LinearLayout in the component tree of the Layout Inspector

Exception seen in logcat:
tk.zielony.carbonsamples E Inspector layoutinspector.view.inspection crashed
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.res.ColorStateList.getDefaultColor()' on a null object reference
at carbon.widget.LinearLayout.getOutlineAmbientShadowColor(LinearLayout.java:788)
at android.view.View$InspectionCompanion.readProperties(View$InspectionCompanion.java:768)
at android.view.View$InspectionCompanion.readProperties(View$InspectionCompanion.java:18)
at com.android.tools.agent.appinspection.proto.property.PropertyCache$Data.readProperties(PropertyCache.kt:44)
at com.android.tools.agent.appinspection.proto.ViewExtensionsKt.createPropertyGroupImpl(ViewExtensions.kt:223)
at com.android.tools.agent.appinspection.proto.ViewExtensionsKt.createPropertyGroup(ViewExtensions.kt:191)
at com.android.tools.agent.appinspection.proto.ViewExtensionsKt.createGetPropertiesResponse(ViewExtensions.kt:181)
at com.android.tools.agent.appinspection.ViewLayoutInspector$handleGetProperties$1$1.run(ViewLayoutInspector.kt:788)
at com.android.tools.agent.app.inspection.concurrent.HandlerThreadExecutor$SafeHandler.dispatchMessage(HandlerThreadExecutor.java:71)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.os.HandlerThread.run(HandlerThread.java:67)

This is because carbon.widget.LinearLayout.getOutlineAmbientShadowColor is dereferencing the ambitneShadowColor unconditionally when it is null.