Replace more instances of rtc::RefCountedObject with make_ref_counted.

This is essentially replacing `new rtc::RefCountedObject` with
`rtc::make_ref_counted` in many files. In a couple of places I
made minor tweaks to make things compile such as adding parenthesis
when they were missing.

Bug: webrtc:12701
Change-Id: I3828dbf3ee0eb0232f3a47067474484ac2f4aed2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215973
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33852}

pc/jsep_transport_controller_unittest.cc

@@ -50,7 +50,7 @@ class FakeIceTransportFactory : public webrtc::IceTransportFactory {
       const std::string& transport_name,
       int component,
       IceTransportInit init) override {
-    return new rtc::RefCountedObject<cricket::FakeIceTransportWrapper>(
+    return rtc::make_ref_counted<cricket::FakeIceTransportWrapper>(
         std::make_unique<cricket::FakeIceTransport>(transport_name, component));
   }
 };