The toolchain won't run on Android anyway. I would enjoy having, say, a Jolla or Ubuntu tablet that would run an Android toolchain.
ChromeOS is doing fine in the laptop/netbook form factor. Trying to unify the touch and pointing-device worlds is what made Microsoft late to the party.
I use AIDE and a git client on my tablet to read and run code. But it is a long way from having the refactoring, linting, and good error reporting of a highly mature Java IDE. Could be used to fix a problem in a pinch, but it would need tons of work to match Android Studio or Eclipse.
To be clear: you are saying the toolchain does run, but not to your liking?
It has been possible to install real Linux distros on Android for a while (X and all), with no root required. So you can install and run Android Studio if you so wish. It probably will be slow, but it can be done - today.
ChromeOS is doing fine in the laptop/netbook form factor. Trying to unify the touch and pointing-device worlds is what made Microsoft late to the party.