Fix video slow to appear on first launch.

webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m

Index: webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m
diff --git a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m
index 6e3dbb5b004d0d5d64651d4da607f7c5217c51b8..92374844c509408e76e161114a375c66170a4ad9 100644
--- a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m
+++ b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCCameraVideoCapturer.m
@@ -141,8 +141,8 @@ static inline BOOL IsMediaSubTypeSupported(FourCharCode mediaSubType) {
                       }
                       [self reconfigureCaptureSessionInput];
                       [self updateOrientation];
-                      [_captureSession startRunning];
                       [self updateDeviceCaptureFormat:format fps:fps];
+                      [_captureSession startRunning];
                       [_currentDevice unlockForConfiguration];
                       _isRunning = YES;
                     }];