Enable Global Custom Attributes for network requests (similar to Traces).

Author: visumickey

firebase-perf/src/main/java/com/google/firebase/perf/transport/TransportManager.java

@@ -502,7 +502,7 @@ private PerfMetric setApplicationInfoAndBuild(
     ApplicationInfo.Builder appInfoBuilder =
         applicationInfoBuilder.setApplicationProcessState(appState);
 
-    if (perfMetricBuilder.hasTraceMetric()) {
+    if (perfMetricBuilder.hasTraceMetric() || perfMetricBuilder.hasNetworkRequestMetric()) {
       appInfoBuilder =
           appInfoBuilder
               .clone() // Needed so that we don't add global custom attributes everywhere