fix(@angular/cli): add set SessionEngaged in GA

This is required for realtime reports.

(cherry picked from commit 5f40733)

Author: alan-agius4

packages/angular/cli/src/analytics/analytics-collector.ts

@@ -46,6 +46,7 @@ export class AnalyticsCollector {
       [RequestParameter.UserAgentArchitecture]: os.arch(),
       [RequestParameter.UserAgentPlatform]: os.platform(),
       [RequestParameter.UserAgentPlatformVersion]: os.version(),
+      [RequestParameter.SessionEngaged]: 1,
     };
 
     if (ngDebug) {