planning: remove pedestrian stop timer status from PlanningContext
planning: remove pedestrian stop timer status from PlanningContext

jinghaomiao/apollo,ApolloAuto/apollo,jinghaomiao/apollo,ApolloAuto/apollo,ApolloAuto/apollo,ApolloAuto/apollo,xiaoxq/apollo,ycool/apollo,xiaoxq/apollo,xiaoxq/apollo,xiaoxq/apollo,ycool/apollo,jinghaomiao/apollo,jinghaomiao/apollo,ycool/apollo,ycool/apollo,xiaoxq/apollo,jinghaomiao/apollo,ycool/apollo,ycool/apollo,jinghaomiao/apollo,ApolloAuto/apollo,ApolloAuto/apollo,xiaoxq/apollo