PipeWire capturer: set capturer as failed when session is closed

Marking capturer as failed will indicate consumers will not be getting
any new frames by sending back ERROR_PERMANENT and let them know that
screencast can be stopped from their side. This will make screencast to
stop when a window we share is closed or when screencast is closed from
system tray.

Bug: chromium:40276865
Change-Id: Ia2c13461bd3126cab9c4838b8aa6840578562e9e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/339560
Commit-Queue: Jan Grulich <grulja@gmail.com>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Cr-Commit-Position: refs/heads/main@{#41817}

modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc

diff --git a/modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc b/modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc
index 40764de..81caa9b 100644
--- a/modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc
+++ b/modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc
@@ -112,6 +112,7 @@
   if (!capturer_failed_) {
     options_.screencast_stream()->StopScreenCastStream();
   }
+  capturer_failed_ = true;
 }
 
 void BaseCapturerPipeWire::UpdateResolution(uint32_t width, uint32_t height) {