I would have expected this, but not after pushing Kotlin. Kotlin is shiny enough to temporarily distract the typical developer from the daily struggles with the abysmal Android API.
Kotlin and Java it will be for the next 10 years, for better or worse.
Dart is not very popular within Google itself, and Fuchsia is nothing more than a paid hobby project[0].
[0] See https://www.reddit.com/r/programming/comments/6a026o/googles... for a pretty damning review