Fix double click on rotated display

A double-click outside the device content (in the black borders) resizes
so that black borders are removed. But the display rotation was not
taken into account to detect the content.

Use the content size instead of the frame size to fix the issue.

Ref: <https://github.com/Genymobile/scrcpy/issues/898#issuecomment-610993695>

app/src/input_manager.c

@@ -543,8 +543,8 @@ input_manager_process_touch(struct input_manager *im,
 static bool
 is_outside_device_screen(struct input_manager *im, int x, int y)
 {
-    return x < 0 || x >= im->screen->frame_size.width ||
-           y < 0 || y >= im->screen->frame_size.height;
+    return x < 0 || x >= im->screen->content_size.width ||
+           y < 0 || y >= im->screen->content_size.height;
 }
 
 static bool