Track activity launch failure.

If activity launch is failed twice, we give up and finish the activity
but currently we are not tracking the failures. This change fixes that.

Bug: 37172206
Test: manual
Change-Id: Idc67a5e44cbef97985494f42211d24a3697f607b

services/core/java/com/android/server/am/ActivityStackSupervisor.java

@@ -1491,6 +1491,7 @@ public class ActivityStackSupervisor extends ConfigurationContainer implements D
 
             // This is the first time we failed -- restart process and
             // retry.
+            r.launchFailed = true;
             app.activities.remove(r);
             throw e;
         }