Capture mouse control events on android

- [x] I have checked that a similar [feature request](https://github.com/Genymobile/scrcpy/issues?q=is%3Aopen+is%3Aissue+label%3A%22feature+request%22) does not already exist.

Hey it would be great to have a cursor for the touch inputs, ( not from hid )
So for that, we can use an overlay in android to display a cursor by capturing the touch events

if scrcpy server can broadcast the touch inputs from controller, then we can build third party android apps, which will listen to those broadcast events and display a cursor using a floating window on android

or if not on server side ( android ), if we can grab the touch events on client side then also we can communicate to the third party apps using those events, with some extra steps

Start by tracing how scrcpy handles touch inputs on the Android server and client sides, since the issue leaves both options open. Determine whether the completed work should broadcast controller touch events for third-party Android apps or expose them from the client for communication with those apps.

Written by the indexing model from the issue text.