Move gfx::Display/Screen to display::Display/Screen in aura/events

BUG=597761

Review URL: https://codereview.chromium.org/1922783002

Cr-Commit-Position: refs/heads/master@{#389806}

diff --git a/ui/aura/BUILD.gn b/ui/aura/BUILD.gn
index 5fddebe..e8e84a1 100644
--- a/ui/aura/BUILD.gn
+++ b/ui/aura/BUILD.gn

@@ -99,6 +99,7 @@
     "//ui/base",
     "//ui/base/ime",
     "//ui/compositor",
+    "//ui/display",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events/platform",
@@ -190,6 +191,7 @@
     "//ui/base:test_support",
     "//ui/base/ime",
     "//ui/compositor:test_support",
+    "//ui/display",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events:test_support",
@@ -264,6 +266,7 @@
     "//testing/gtest",
     "//ui/base:test_support",
     "//ui/compositor:test_support",
+    "//ui/display:test_support",
     "//ui/events:gesture_detection",
     "//ui/events:test_support",
     "//ui/gfx",