[automerge] Export external/libtextclassifier to AOSP. 2p: 1075b1e4e3

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libtextclassifier/+/19932204

Bug: 187927611
Change-Id: I314d2899800a28315764686529d6b1d7e03556c6