vk: Move //ui/keyboard to //ash/keyboard/ui

To make this CL as small as possible, we're just moving the directories
and updating any references.

We had to add a few DEPS from chrome to ash/keyboard/ui.

In future patches well consider what files should go where and whether
we want to keep keyboard code in its own self-contained module.

TBR=benwells@chromium.org

Bug: 961568
Change-Id: I27c140ab51709ebb89910fe43b96bf64a38100d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1605584
Reviewed-by: Ben Wells <benwells@chromium.org>
Reviewed-by: Oliver Chang <ochang@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659376}

diff --git a/BUILD.gn b/BUILD.gn
index 01cf5cf..c01e2de 100644
--- a/BUILD.gn
+++ b/BUILD.gn

@@ -402,13 +402,13 @@
       "//ash:ash_unittests",
       "//ash/app_list:app_list_demo",
       "//ash/app_list:app_list_unittests",
+      "//ash/keyboard/ui:keyboard_unittests",
       "//chrome/test:usage_time_limit_unittests",
       "//chromeos:chromeos_unittests",
       "//chromeos/components:chromeos_components_unittests",
       "//chromeos/components/proximity_auth:proximity_auth_unittests",
       "//components/session_manager/core",
       "//ui/chromeos:ui_chromeos_unittests",
-      "//ui/keyboard:keyboard_unittests",
     ]
   }