support Chromium/Chrome audio channels

--upstream patch from Plasma taskmanagers

plasmoid/package/contents/ui/main.qml

@@ -870,7 +870,7 @@ Item {
         engine: "mpris2"
         connectedSources: sources
         function sourceNameForLauncherUrl(launcherUrl, pid) {
-            if (!launcherUrl || launcherUrl == "") {
+            if (!launcherUrl || launcherUrl === "") {
                 return "";
             }
 
@@ -889,11 +889,11 @@ Item {
                 }
 
                 var sourceData = data[source];
-                if (!sourceData || sourceData.DesktopEntry !== desktopFileName) {
+                if (!sourceData) {
                     continue;
                 }
 
-                if (pid === undefined || sourceData.InstancePid === pid) {
+                if (sourceData.DesktopEntry === desktopFileName || (pid && sourceData.InstancePid === pid)) {
                     return source;
                 }