[automerger skipped] Add test for libtextclassifier am: 53a1ccabde -s ours

am skip reason: Change-Id I5c86c82348f1866967393fa62d3eaa89faf144b3 with SHA-1 4898a32e51 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libtextclassifier/+/12792928

Change-Id: Ibeb4d103e4c1c4d989256f6cf53382aacc24a2c6