Reland of Removes usage of native base::android::GetApplicationContext()

webrtc/webrtc.gni

Index: webrtc/webrtc.gni
diff --git a/webrtc/webrtc.gni b/webrtc/webrtc.gni
index 745a66576cb7bc710af1c8874c9e71a3c9b7fb58..d4acaf526884ed977558d7f987457001814c51ce 100644
--- a/webrtc/webrtc.gni
+++ b/webrtc/webrtc.gni
@@ -266,6 +266,10 @@ template("rtc_test") {
     if (defined(invoker.public_configs)) {
       public_configs += invoker.public_configs
     }
+    if (!build_with_chromium && is_android) {
+      android_manifest = "//webrtc/test/android/AndroidManifest.xml"
+      deps += [ "//webrtc/test:native_test_java" ]
+    }
   }
 }