[network-data-notifier] fix flag for child removed notification (#4805)
[network-data-notifier] fix flag for child removed notification (#4805)


abtink/openthread,jwhui/openthread,bukepo/openthread,chshu/openthread,librasungirl/openthread,lanyuwen/openthread,openthread/openthread,chshu/openthread,bukepo/openthread,lanyuwen/openthread,chshu/openthread,chshu/openthread,lanyuwen/openthread,bukepo/openthread,librasungirl/openthread,jwhui/openthread,chshu/openthread,openthread/openthread,openthread/openthread,srickardti/openthread,lanyuwen/openthread,chshu/openthread,abtink/openthread,librasungirl/openthread,lanyuwen/openthread,srickardti/openthread,srickardti/openthread,abtink/openthread,lanyuwen/openthread,srickardti/openthread,openthread/openthread,bukepo/openthread,jwhui/openthread,abtink/openthread,jwhui/openthread,librasungirl/openthread