Object Detection: tflite conversion documentation missing metadata adding instructions for Android deployment added in new commit

Prerequisites

Please answer the following question for yourself before submitting an issue.

• [ x ] I checked to make sure that this issue has not been filed already.

1. The entire URL of the documentation with the issue

https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/running_on_mobile_tensorflowlite.md

https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/running_on_mobile_tf2.md

https://github.com/tensorflow/examples/tree/master/lite/examples/object_detection/android

2. Describe the issue

The links above point to Android example where latest change in code is not reflected in documentation.

https://github.com/tensorflow/examples/tree/master/lite/examples/object_detection/android

Current example code expects zip based tflite with metadata, but documentation does not provide instruction for it.

https://github.com/tensorflow/examples/commit/de42482b453de6f7b6488203b20e7eec61ee722e#diff-0cf980453f18b3cc1368f8eb16a803f9L113

Without this step it gives error when deploying to android,

java.lang.IllegalStateException: This model does not contain associated files, and is not a Zip file.
        at org.tensorflow.lite.support.metadata.MetadataExtractor.assertZipFile(MetadataExtractor.java:325)
        at org.tensorflow.lite.support.metadata.MetadataExtractor.getAssociatedFile(MetadataExtractor.java:165)
        at org.tensorflow.lite.examples.detection.tflite.TFLiteObjectDetectionAPIModel.create(TFLiteObjectDetectionAPIModel.java:116)

I have commented on this issue below with detailed information on error,

https://github.com/tensorflow/tensorflow/issues/43583