Cherry-pick of ag/13348706

It can not be built yet.

Removed "tensorflow_lite_support/metadata/java" and
"tensorflow_lite_support/metadata/python" as it contains a blocked
keyword there. We are only going to take the C++ part anyway.

Bug: 180325304

Test: N/A

Change-Id: If796d75f1d867963b080826e401749b27c372cc2