Merge video_capture tests into service_unittests

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index d93cc2df1401712fc8e187dc666479fab63c2287..735732129f8c174069f722e3aee952beeeafde26 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -729,7 +729,6 @@ group("gn_only") {
       "//media/mojo:media_mojo_unittests",
       "//mojo/common:mojo_common_perftests",
       "//services:service_unittests",
-      "//services/video_capture:video_capture_unittests",
     ]
   }