Forward Ctrl to the device
Forward Ctrl to the device

Now that the scrcpy shortcut modifier is Alt by default (and can be
configured), forward Ctrl to the device.

This allows to trigger Android shortcuts.

Fixes #555 <https://github.com/Genymobile/scrcpy/issues/555>

Genymobile/scrcpy,Genymobile/scrcpy,Genymobile/scrcpy