chromeos: converts UIControlsFactoryOzone to use RemoteEventDispatcher

UIControlsFactoryOzone is used to inject events. To make this work
better with the Window Service this patch converts it to use
RemoteEventDispatcher, which routes the event to the Window Service.

BUG=none
TEST=none

Change-Id: Ib7379b3fb6ee4a81cb01145cf24565ad951c8dbe
Reviewed-on: https://chromium-review.googlesource.com/951632
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541278}

ui/aura/BUILD.gn

@@ -277,6 +277,7 @@ jumbo_static_library("test_support") {
     "//base/test:test_support",
     "//cc:test_support",
     "//components/viz/test:test_support",
+    "//services/service_manager/public/cpp",
     "//services/ui/public/cpp/input_devices",
     "//services/ui/public/interfaces",
     "//skia",