Move ThrowProperty delegate to support-test

[jonalmeida]

This is a handy helper when you need to create a stub implementation of an API.

It might be handy to move this to the support-test component` with some docs.

android-components/components/feature/customtabs/src/test/java/mozilla/components/feature/customtabs/feature/CustomTabSessionTitleObserverTest.kt

Lines 90 to 96 in d4d1449

	private class ThrowProperty<T> : ReadWriteProperty<Any, T> {
	override fun getValue(thisRef: Any, property: KProperty<*>): T =
	throw UnsupportedOperationException("Cannot get $property")
	override fun setValue(thisRef: Any, property: KProperty<*>, value: T) =
	throw UnsupportedOperationException("Cannot set $property")
	}

┆Issue is synchronized with this Jira Task

[waahm7]

@jonalmeida I would love to do this. Can you please assign this to me?

[levimatheri]

@jonalmeida I have a pending PR on this already

[jonalmeida]

I saw! Left a review comment. 🙂