Tap events propagating when isPassThroughParentEnabled = false;

Environment

• CLI: 5.0.1
• Cross-platform modules: 5.0.3
• Android Runtime: 5.0.0
• iOS Runtime: 5.0.0

Describe the bug

Tap events are being propagated to parent objects, even when isPassThroughParentEnabled = false;

To Reproduce

Add nested tap events to the objects, a Label with a tap inside a StackLayout with another tap is enough, the StackLayout event will be fired even when the touch is on the Label.

<ScrollView tap="test">
    <StackLayout tap="test">
       <Label text="Touch this label" tap="test" textWrap="true"/>
    </StackLayout>
</ScrollView>

export function test(args: EventData) {
    (<any>args.object).isPassThroughParentEnabled = false; // This seems to be ignored
    console.log("Touch on " + args.object);
}

Expected behavior

Taps not being propagated when isPassThroughParentEnabled is set to false.

Sample project

https://play.nativescript.org/?template=play-tsc&id=pj7FjN
Tap the label and see a log for each element.

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Start by running the linked NativeScript Playground sample and reproduce the nested tap handlers on the Label, StackLayout, and ScrollView. Trace the event propagation path for isPassThroughParentEnabled on Android and iOS, then add regression coverage; done means tapping the Label no longer logs parent handlers when the property is false.