Export libtextclassifier Export libtextclassifier without the model downloader code to mainline-prod for a few changes we want for the upcoming mainline release. Test: atest -p external/libtextclassifier Test: Smart selection + smart reply on a R device Fixes: 179890518 Change-Id: I0da4487432920e3f95cb00d4f44c8ec257f4b81b