Layout can hang indefinitely with Infinite width

[mattprecious]

I thought the minimal repro was going to simply be 'pass Infinity to MeasureScope.layout()', but it seems to be more complicated than that.

@Test
fun infinity() = runTest {
  runMosaicTest {
    setContentAndSnapshot {
      Layout(content = { Text("Hello") }) { measurables, constraints ->
        val placeables = measurables.map { it.measure(constraints) }
        layout(constraints.maxWidth, placeables.sumOf { it.height }) {
          placeables.forEach { it.place(0, 0) }
        }
      }
    }
  }
}

Seems like there needs to be a Text in the content, and it needs to be measured and placed. The height also needs to be non-Infinity.

I don't think that this should necessarily be supported, but throwing an exception would be better than hanging.