Update Android.bp following external/flatbuffers rebase am: caa8c1033a am: 0da9668207

Original change: https://android-review.googlesource.com/c/platform/external/libtextclassifier/+/2193466

Change-Id: Ieb632a4a36a84afd4b2fa6cc850b76c7309d0950
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>