Provide all the reasons a layer is invisible in Winscope

Currently we print only 1 reason and this makes debugging issues harder

Bug: 210476324
Test: compile winscope and dump a trace, check if multiple reasons for
invisible layers appear

Change-Id: Ia755c001a32a8bdcae3d8a31365ff1cfde28bb2f

tools/winscope/src/SurfaceFlingerTraceView.vue

@@ -37,7 +37,14 @@ export default {
       const summary = [];
 
       if (layer?.visibilityReason) {
-        summary.push({key: 'Invisible due to', value: layer.visibilityReason});
+        let reason = "";
+        if (Array.isArray(layer.visibilityReason)) {
+          reason = layer.visibilityReason.join(", ");
+        } else {
+          reason = layer.visibilityReason;
+        }
+
+        summary.push({key: 'Invisible due to', value: reason});
       }
 
       if (layer?.occludedBy?.length > 0) {