message: Fix typo in histogram name
  Cr-Commit-Position: refs/heads/main@{#39258}
diff: namespace webrtc {
  void LogDesktopCapturerFullscreenDetectorUsage() {
  - RTC_HISTOGRAM_BOOLEAN("WebRTC.Screenshare.DesktopCapturerUsage", true);
  + RTC_HISTOGRAM_BOOLEAN("WebRTC.Screenshare.DesktopCapturerFullscreenDetector",
  + true);
  }
  DesktopCapturer::~DesktopCapturer() = default;
  