Expose basic Android functionality like sending SMS or accessing GPS data to the
com.termux app. This is an add-on which requires that the main Termux app is
installed to use.

* Read and send sms messages from your terminal.
* Access device GPS location sensor from scripts.
* Pipe the result of commands into the device text-to-speech engine.
* Vibrate the device when something interesting happens.
* Access the system clipboard from shell scripts.
* List contacts from the system contact list.

B