Residualvm currently does not support Android.
However, we have an experimental version that works, but hasn't been tested yet.
If you look at
this thread you'll find a link to an .apk file, which is the format used for packaging Android applications.
Next, you'll need to transfer your grim fandango installation to your tablet's internal storage.
You can use the standard usb storage or android file transfer tool for that.
Finally, you can start up residualvm, add the game from your internal storage (it's probably /sdcard or /mnt/sdcard), and launch the game.
The thread I linked above also contains some experimental controls, so please leave a message there whether they're awful or usable.