Termux:API (github version) 0.50.1

Re-release of v0.50.0 with semantic versioned github release tag since APK attachment to release failed previously. Too late to do this without version bump since F-Droid has already detected v0.50.0 release.

Noticeable changes, except for various cleanup and "under-the-hood" improvements, include:

• fix sender name in termux-sms-list
• fix so that inbox message filtering works in termux-sms-list
• fix so that termux-camera-photo works (at least on Samsung devices)
• add the option for api scripts to communicate with termux-api through a unix socket, thereby decreasing execution time

Thanks to all the contributors!

The Termux:API add-on provides command line access to device API:s:

* 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.

Besides installing this app an additional package is required to install inside Termux:
$ apt install termux-api

See the following documentation about available API commands:
wiki.termux.com/wiki/Termux:API

NOTE: This is an add-on which requires that the main Termux app is installed to use.