[automerger skipped] Export libtextclassifier and make some native tests working again am: a06bdc71ed -s ours am: 96376c6f9e -s ours

am skip reason: Change-Id I98b25793e9644bee43f416255911d969b31d91b7 with SHA-1 a06bdc71ed is in history

Change-Id: Ie3439d539e2a8baac5b3a53786a5aad3d3ddfd38