Bug 1462408 - Set correct Intent flags when launching Fennec crash reporter r=jchen

MozReview-Commit-ID: 6iXgivUWIWu

--HG--
extra : rebase_source : c7869baddc2eb03e27a88e75b73b1f3afe9768cc

mobile/android/geckoview/src/main/java/org/mozilla/gecko/CrashReporterService.java

@@ -66,6 +66,7 @@ public class CrashReporterService extends IntentService {
         Class<?> reporterActivityCls = getFennecReporterActivity();
         if (reporterActivityCls != null) {
             intent.setClass(this, reporterActivityCls);
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             startActivity(intent);
             return;
         }