Add public_deps for //services/network:test_support

The test_support target should expose //services/network/public/mojom and ../cpp
so we can avoid making embedder test targets to explicitly depend on
//services/network/public/mojom and ../cpp.

See https://chromium-review.googlesource.com/c/chromium/src/+/1095594 for an
example.

TBR:bauerb@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: Ib60c096e1c29f90c08204141a43454944c9934ed
Reviewed-on: https://chromium-review.googlesource.com/1099138
Commit-Queue: Helen Li <xunjieli@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567071}

components/search_provider_logos/BUILD.gn

@@ -102,8 +102,6 @@ source_set("unit_tests") {
     "//components/sync_preferences:test_support",
     "//net:test_support",
     "//services/network:test_support",
-    "//services/network/public/cpp",
-    "//services/network/public/mojom",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/gfx",

services/network/BUILD.gn

@@ -249,13 +249,17 @@ source_set("test_support") {
     "udp_socket_test_util.h",
   ]
 
+  public_deps = [
+    "//services/network/public/cpp",
+    "//services/network/public/mojom",
+  ]
+
   deps = [
     "//base",
     "//mojo/public/cpp/bindings",
     "//net",
     "//net:test_support",
     "//services/network:network_service",
-    "//services/network/public/mojom",
     "//testing/gtest",
   ]
 }