Use natural device orientation for --new-display

If no size is provided with --new-display, the main display size is
used. But the actual size depended on the current device orientation.

To make it deterministic, use the size of the natural device orientation
(portrait for phones, landscape for tablets).

server/src/main/java/com/genymobile/scrcpy/video/NewDisplayCapture.java

@@ -84,6 +84,9 @@ protected void init() {
             DisplayInfo displayInfo = ServiceManager.getDisplayManager().getDisplayInfo(0);
             if (displayInfo != null) {
                 mainDisplaySize = displayInfo.getSize();
+                if ((displayInfo.getRotation() % 2) != 0) {
+                    mainDisplaySize = mainDisplaySize.rotate(); // Use the natural device orientation (at rotation 0), not the current one
+                }
                 mainDisplayDpi = displayInfo.getDpi();
             } else {
                 Ln.w("Main display not found, fallback to 1920x1080 240dpi");