Update ProxyDroid (by @NVISOsecurity) (#3111)

* Update ProxyDroid (by @NVISOsecurity)

* Fix linting

* Rewording

* Apply suggestions from code review

* Update tools/android/MASTG-TOOL-0120.md

---------

Co-authored-by: Carlos Holguera <perezholguera@gmail.com>

tools/android/MASTG-TOOL-0120.md

@@ -1,7 +1,13 @@
 ---
-title: proxyDroid
+title: ProxyDroid
 platform: android
-source: https://play.google.com/store/apps/details?id=org.proxydroid&hl=en
+source: https://github.com/madeye/proxydroid/
 ---
 
-ProxyDroid is an app that can help you to set the proxy (e.g. HTTP/HTTPS) on your Android device.
+ProxyDroid is an open source app [available in Google Play](https://play.google.com/store/apps/details?id=org.proxydroid) that configures your device to send HTTP(S) traffic to a proxy. It is especially useful for apps that ignore the system's proxy settings, as it uses `iptables` to force the traffic to your proxy.
+
+Due to the usage of `iptables`, there are a few limitations to consider:
+
+- ProxyDroid only works on rooted devices
+- Only port 80, 443 and 5228 are intercepted
+- The proxy needs to be configured in _transparent proxy_ mode