UI tests flaky on SDK 24 emulator

[zach-klippenstein]

Tests fail regularly with the following error:

com.squareup.sample.TicTacToeEspressoTest > canGoBackInModalView[test(AVD) - 7.0] FAILED 
	kotlin.reflect.jvm.internal.KotlinReflectionInternalError: Introspecting local functions, lambdas, anonymous functions and local variables is not yet fully supported in Kotlin reflection
	at kotlin.reflect.jvm.internal.EmptyContainerForLocal.fail(EmptyContainerForLocal.kt:41)

They usually pass on the next re-run.