Style: Enforce braces around if blocks and loops

Using clang-tidy's `readability-braces-around-statements`.
https://clang.llvm.org/extra/clang-tidy/checks/readability-braces-around-statements.html

modules/webrtc/webrtc_peer_connection.cpp

@@ -37,8 +37,9 @@ Ref<WebRTCPeerConnection> WebRTCPeerConnection::create_ref() {
 }
 
 WebRTCPeerConnection *WebRTCPeerConnection::create() {
-	if (!_create)
+	if (!_create) {
 		return nullptr;
+	}
 	return _create();
 }