Add sdk_version: "current" to libtextclassifier_hash_headers am: 1a1a7ac3ee am: 6702d662a3

Original change: https://android-review.googlesource.com/c/platform/external/libtextclassifier/+/1970659

Change-Id: Ie4cdfeb3e77589dac6cace764493c9197c456dc4