DEPS.xwalk: Roll ozone-wayland (6f1674e -> 9a04e61).

9a04e61 Stop DisplayPollThread in StopProcessingEvents.
a325924 Ensure OzonePlatformWayland is destroyed at shutdown.
55b2036 Fix the crash that happens when touch device is re-enabled.
53f8552 Fix the crash that happens when touch device is re-enabled.

It includes some commits related to Tizen's TC-1835 (hopefully fixing
it).
Merge pull request #2542 from rakuco/roll-oz-wl

DEPS.xwalk: Roll ozone-wayland (6f1674e -> 9a04e61).