Implement seamless copy-paste from Android to computer

[rom1v]

Automatically synchronize the device clipboard to the computer any time it changes.

Refs #1056 (comment)

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To test, just copy some text on the Android device while scrcpy is running, then Ctrl+v in some text area on the computer.

The other direction is not synchronized automatically, because:

• SDL does not provide a notification mechanism to listen to clipboard changes
• it could leak data unexpectedly (if I copy from my password manager on the computer while scrcpy is running, I don't expect my password to be copied to the device, the other direction is less problematic IMO, because it is expected that the computer can access the device)

Here are binaries so that you can test even if you don't know how to build:

• scrcpy.exe
  SHA256: a89ce793ee5d1e9177288f5b3756986015c76d0200521ad1cb227f782bfda095
• scrcpy-server
  SHA256: e076176b01a70554188b9728f06b3d65dab63245be19c6b33ded2939008265eb

(on Windows, replace both files in the v1.13 release; on other platforms, use scrcpy-server and follow §Prebuilt server)

[rom1v]

Merged acc4ef3

[emac]

Doesn't work for me.

OS: MIUI 12.5.1

[rom1v]

Which scrcpy version?

scrcpy --legacy-paste

if this does not work.

[emac]

It's related to a specific setting on my phone. After I turn it off, it works now.

[rom1v]

@emac What was this specific setting? How to turn it off?

[emac]

I'm using Xiaomi phone, which has a privacy setting deciding whether an app can read content from the phone's clipboard. It has to be turned off.

[rom1v]

Could you post a screenshot of that setting, please? (for the FAQ)

[emac]

Here you go.

[rom1v]

Thank you.

May I ask you to switch your device to English in system settings and take another screen in English (then switch back)? 😉

[rom1v]

@emac Could you post a screehshot in English, please, that would help other people :)

[emac]

Here it is.