Nothing official but after all these efforts with ART and jack&Jill both of which are not tied to java, it seems likely that Google is at least experimenting with another language.
IMO, moving to another language should be taken as an opportunity to fix the oversights of the Framework. Things like the atrocious Activity lifecycle or the backstack handling.
There are several contenders :
-Dart : Google controls this language and the Dart Team is openly experimenting with their own Android fralewirj. The results are extremely underwhelming so far though.
-Kotlin : A better Java. I doubt that it would solve Android legal troubles though.
-Rust : the language has so many interesting ideas. I don't know if its complexity is
warranted in Android's context though.
-a new language inspired by Kotlin, Rust, Go, Swift,... . Why not ? It would need a serious value proposition in order to be interesting though.
-insert your pet language here : everyone seems to want to develop Android apps in their most familiar language ...
Again, the official word from the Android team is that Java is the language of the platform for the time being.
I just hope that if they are indeed planning a switch to another language, it will be discussed in the open beforehand. Such a debate is not always constructive, but it could be very important in Android's context.
Just in time for all the Oracle lawsuits confirming that Java apis are patent encumbered.