Consider adding more documentation about when and how to use scrcpy.adb

[frederickjh]

Hi! Please considered adding more information to the documentation and a link to the documentation to the Snap Store page for scrpy.adb.

I was having issues as I have a different version of adb installed with the android-tools-adb package in Ubuntu. I was seeing messages in the terminal when running adb and scrpy command like the following:

$ adb devices -l
List of devices attached
adb server version (39) doesn't match this client (40); killing...
* daemon started successfully

$ scrcpy
INFO: scrcpy 1.16 <https://github.com/Genymobile/scrcpy>
adb server version (40) doesn't match this client (39); killing...
* daemon started successfully
/usr/local/share/scrcpy/scrcpy-server: 1 file pushed. 1.5 MB/s (33622 bytes in 0.022s)
[server] INFO: Device: XXX XXXXXXXX (Android 9)
INFO: Renderer: opengl
INFO: OpenGL version: 4.6.0 NVIDIA 390.25
INFO: Trilinear filtering enabled
INFO: Initial texture: 1440x2560

Notice the lines in both adb server version (40) doesn't match this client (39); killing...

This really became an issue when I decide to connect via Wi-Fi instead of via the USB cable.

$ adb tcpip 5555
adb server version (39) doesn't match this client (40); killing...
* daemon started successfully
$ adb connect 192.168.1.25:5555 
connected to 192.168.1.25:5555
$ scrcpy 
INFO: scrcpy 1.16 <https://github.com/Genymobile/scrcpy>
adb server version (40) doesn't match this client (39); killing...
* daemon started successfully
adb: error: failed to get feature set: no devices/emulators found
ERROR: "adb push" returned with value 1

What enabled me to get this working and stop seeing the adb server version (40) doesn't match this client (39); killing... messages was to use the adb built into the snap, scrpy.adb.

$ scrcpy.adb devices -l
List of devices attached
XXXXXXXXXXXXXXXX       device usb:1-1 product:XX-XXXX_XXXX model:XX_XXXX device:NB1 transport_id:1
$ scrcpy.adb usb
restarting in USB mode
$ scrcpy.adb tcpip 5555
$ scrcpy.adb connect 192.168.1.25:5555
connected to 192.168.1.25:5555
$ scrcpy
INFO: scrcpy 1.16 <https://github.com/Genymobile/scrcpy>
/usr/local/share/scrcpy/scrcpy-server: 1 file pushed. 0.6 MB/s (33622 bytes in 0.051s)
[server] INFO: Device: XXXXX XXXXXXX (Android 9)
INFO: Renderer: opengl
INFO: OpenGL version: 4.6.0 NVIDIA 390.25
INFO: Trilinear filtering enabled
INFO: Initial texture: 1440x2560
[server] INFO: Device screen turned off

See Genymobile/scrcpy#1126 for an example of how this is being reported by users in the upstream project.

Please consider adding documentation that says if you see a message like adb server version (40) doesn't match this client (39); killing... to use the adb built into the snap, scrpy.adb and give examples. Also consider linking from the Snap store page to the documentation on the Github page.