[automerger skipped] Merge "Enable extservices tests to generate android-mts-extservices as well as android-mts." into mainline-prod am: 2587b43b53 -s ours

am skip reason: Change-Id I48e48bdee8957ebbd4c5c3db95854fc0a0cdb13d with SHA-1 64e7bf56cc is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libtextclassifier/+/13386145

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ibcc35322ebc40df2beb1946a5bc77f996e79a4ea