Add shortcuts to rotate display

[rom1v]

Add Ctrl+Left and Ctrl+Right shortcuts to rotate the scrcpy window.

Contrary to --lock-video-orientation (#1151), the rotation has no impact on recording, and can be changed dynamically (and immediately).

This provides an alternative solution for #218.

There are now 3 different (cumulative) rotations:

• Ctrl+r to request the device to rotate between portrait and landscape
• --lock-video-orientation to force a mirroring/recording orientation
• Ctrl+← and Ctrl+→ to rotate the scrcpy window

Please review/test on your platform :) Feedbacks welcome.

I'll probably merge in dev soon.

Thank you

[dre-z17]

My phone must be a piece.

Screen rotation works with all apps other than my built in camera app. The SCRCPY window within my PC refuses to rotate out of vertical portrait layout to a horizontal landscape layout.

I've attached screenshot. The image shows multiple 'request to rotate' msgs but nothing happens.

Hopefully a screenshot doesn't violate tos :(

Maybe I failed to uninstall the old build correctly(?). Will keep trying when I'm free tomorrow. I have appointments remainder of the day and an evening event too.

Thx for a killer app nonetheless.

[rom1v]

You requested to rotate to landscape, but the app refuses. This is expected for many camera apps.

The new feature in this PR consists in rotating the scrcpy window with Ctrl+LEFT and Ctrl+RIGHT.

[rom1v]

Feature merged in dev.

I also added --rotation value to set the initial rotation.

[perrette]

Excellent app and great feature !
For whoever ends here, it seems to have been changed to ALT + LEFT and ALT + RIGHT (scrcpy 2.3.1, Ubuntu 22.04).

[rom1v]

@perrette Yes, the default shortcuts modifier was changed a long time ago (in v1.15 by #1598).

https://github.com/Genymobile/scrcpy/blob/master/doc/shortcuts.md