Move the test template to //testing/test.gni (part 2)

mojo/edk/system/BUILD.gn

Index: mojo/edk/system/BUILD.gn
diff --git a/mojo/edk/system/BUILD.gn b/mojo/edk/system/BUILD.gn
index 59edfb88c6ea83c12521b22a85fa90b6cf41ebe4..70f04030f88a95c6f024a8647519d8ad78c46209 100644
--- a/mojo/edk/system/BUILD.gn
+++ b/mojo/edk/system/BUILD.gn
@@ -2,13 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//testing/rules.gni")
 import("../mojo_edk.gni")
 
-if (is_android) {
-  import("//build/config/android/config.gni")
-  import("//build/config/android/rules.gni")
-}
-
 config("system_config") {
   defines = [
     # Ensures that dependent projects import the core functions on Windows.
@@ -169,10 +165,6 @@ test("mojo_system_unittests") {
     "//testing/gtest",
   ]
 
-  if (is_android) {
-    deps += [ "//testing/android:native_test_native_code" ]
-  }
-
   allow_circular_includes_from = [ "../embedder:embedder_unittests" ]
 }
 
@@ -194,12 +186,3 @@ test("mojo_message_pipe_perftests") {
     "//testing/gtest",
   ]
 }
-
-if (is_android) {
-  unittest_apk("mojo_system_unittests_apk") {
-    deps = [
-      ":mojo_system_unittests",
-    ]
-    unittests_dep = ":mojo_system_unittests"
-  }
-}