This allows to share an instance of VideoCaptureModulePipeWire which is what browsers usually do when the same camera is being shared with more than one consumer. This matches V4L2 implementation. Bug: webrtc:15211 Change-Id: I2ae466739c2649029e76a29e6f16aad1014e9d42 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/306964 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Jan Grulich <grulja@gmail.com> Cr-Commit-Position: refs/heads/main@{#41639}