ui: Add screenshot to channel docs

Change-Id: Ied9c49b35a84dc296459ae445b69fe111d98e524
diff --git a/docs/images/perfetto-ui-channel-autopush-toggle.png b/docs/images/perfetto-ui-channel-autopush-toggle.png
new file mode 100644
index 0000000..8252a8d
--- /dev/null
+++ b/docs/images/perfetto-ui-channel-autopush-toggle.png
Binary files differ
diff --git a/docs/visualization/perfetto-ui-release-process.md b/docs/visualization/perfetto-ui-release-process.md
index ed0af8d..a7b4326 100644
--- a/docs/visualization/perfetto-ui-release-process.md
+++ b/docs/visualization/perfetto-ui-release-process.md
@@ -42,6 +42,8 @@
 To change to the `autopush` channel, open the `Flags` screen in the `Support`
 section of the sidebar, and choose `Autopush` in `Release channel`.
 
+![perfetto-ui-channel-autopush-toggle.png](/docs/images/perfetto-ui-channel-autopush-toggle.png)
+
 ## Which version am I using?
 
 You can see the version of the UI you are currently using in the bottom left hand corner of the UI.