Woraround possible broken cursor when creating mouse interception window

The xcb_cursor_t returned by xcb-cursor library might be broken. If we
set such a broken cursor directly in the create window call it will fail
with a BadCursor value causing effects to break.

This change works around this problem by creating just the window and
moving the possible breaking call into a change window call. That will
still fail, but the window is working.

In addition it performs a safety check by only installing the cursor
if it's not XCB_CURSOR_NONE.

BUG: 344006
REVIEW: 123025