YARN-6555. Store application flow context in NM state store for work-preserving restart. (Rohith Sharma K S via Haibo Chen)

(cherry picked from commit 47474fffac085e0e5ea46336bf80ccd0677017a3)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/application/ApplicationImpl.java

@@ -46,6 +46,7 @@ import org.apache.hadoop.yarn.proto.YarnProtos;
 import org.apache.hadoop.yarn.proto.YarnServerNodemanagerRecoveryProtos.ContainerManagerApplicationProto;
 import org.apache.hadoop.yarn.proto.YarnServerNodemanagerRecoveryProtos.FlowContextProto;
 import org.apache.hadoop.yarn.server.api.records.AppCollectorData;
+import org.apache.hadoop.yarn.proto.YarnServerNodemanagerRecoveryProtos.FlowContextProto;
 import org.apache.hadoop.yarn.server.nodemanager.Context;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServicesEvent;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServicesEventType;