[Remote Segments] Avoid segments metadata upload if no difference in local store and remote store

[ashking94]

Is your feature request related to a problem? Please describe.
Need to look at 2 issues -

1. Currently in afterRefresh method of RemoteStoreRefreshListener, we upload metadata file even if the local and remote store has not difference in segment files. We need to skip the upload if there are no differences in segment files on local and remote store.
2. Noticing that the afterRefresh method gets invoked twice - once with didRefresh true and other time with false. This leads to minSeqNoToKeep getting set correctly in the second run. Need to fix this as well.