Allow forwarding mouse left click event

- [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.

**Is your feature request related to a problem? Please describe.**
Some of apps i have like Roblox ~(i know it has pc version, just testing android version on scrcpy)~ has a little bit quirky mouse controls because it keeps switching between touch controls and desktop controls.

**Describe the solution you'd like**
Allow forwarding real mouse left click event instead of sending touch input.

**Describe alternatives you've considered**
None

**Additional context**
This is the video for context. In Android version mirrored through scrcpy, the game keeps switching between desktop and touch controls. Roblox pause menu keyboard popup keeps appearing after hovering cursor and disappearing while i spam clicking.

https://github.com/user-attachments/assets/5272e868-f3ca-4341-aeab-b5ca45c79661

This issue does not occur in Roblox Windows client even when i am spam clicking.

https://github.com/user-attachments/assets/e92493e5-ce1d-4c61-9cf6-4fd977c30f95