Um, people have already been able to use Scala to make Android applications. Just about anything that doesn't require dynamically generated JVM bytecode can manage, difficult and error-prone as it is.
If we're talking about official support, then I'd rather Java 8 instead. And beefing up ART even more.
If we're talking about official support, then I'd rather Java 8 instead. And beefing up ART even more.