Probably nothing in Java 9 for the next version, but Android's Java implementation switched to OpenJDK a release or two back so it is always possible though. However most of the apis won't be available in versions of Android before p. Language changes at the compiler level might be available as long as they don't need any new library support.
Kotlin on Android has the same limitations as Java 9 does so other than spending a lot of time catching up the samples,docs, and tooling we probably won't see anything specific to it.