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

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

Change-Id: I4176b6aa472804a078b0f2355731a21bc8df8edf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>