Clean up some more DEPS

Sky itself does't need to depend on //services/debugger. That's already taken
care of by //services depending on //services/debugger. Also, add some direct
depenencies from //sky/sdk to the mojom interfaces used by //sky/sdk.

TBR=eseidel@google.com

Review URL: https://codereview.chromium.org/1232783006 .

BUILD.gn

@@ -6,7 +6,6 @@ group("sky") {
   testonly = true
 
   deps = [
-    "//services/debugger",
     "//sky/engine/platform:platform_unittests",
     "//sky/engine/wtf:unittests",
     "//sky/sdk/example",

sdk/BUILD.gn

@@ -94,8 +94,10 @@ dart_pkg("sky") {
 
   # List of mojom targets that the sky pkg exports
   deps = [
-    "//sky/services/engine:interfaces",
+    "//mojo/services/asset_bundle/public/interfaces",
+    "//mojo/services/keyboard/public/interfaces",
     "//sky/services/activity:interfaces",
+    "//sky/services/engine:interfaces",
   ]
 
   datadeps = [