Add abstractions for parsing TFRecord Files using `tf.Example` and `tf.io` ops about java HOT 3 OPEN

Thanks @dhruvrajan ,

Before we begin, can you please take a look at this old example of mine based on TF1.x where I use tf.io.parseExample? Here I was using raw ops so yes, having a higher-level API to wrap them up would be interesting for sure. But I just wanted to show you how I used to do it and to check if you ended up doing similar too at this stage.

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Hey @dhruvrajan , I didn't hear you back about this point, so are you unblock and do you think the example I provide is enough? (If so, I'll move it to our example repository)

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Hi @dhruvrajan , just to get a little update on this, do you have any plan to add something that helps out building a TFRecord? If so, will that be part of the framework or the keras layer?

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