_retryCount is never used?

It seems there's a `withRetryCount` API in the `builder` but it doesn't seem to be used/supported?

https://github.com/instacart/truetime-android/blob/0630cdf3341b82c2fb16d0ff3e95c32c4ee1a78c/library-extension-rx/src/main/java/com/instacart/library/truetime/TrueTimeRx.java#L31

I was under the impression perhaps that this would provide retry behavior until we reach the max retry count until I looked at the source and realized there are no references to this variable anywhere.

Start at library-extension-rx/src/main/java/com/instacart/library/truetime/TrueTimeRx.java around the linked withRetryCount builder API, then search the repository for _retryCount and withRetryCount references. Trace the builder into the retry flow and verify with existing tests or the relevant entry point; done means the API's intended retry behavior is either supported and covered or the unused API is clearly removed or corrected.

Written by the indexing model from the issue text.