Merge "Enable extservices tests to generate android-mts-extservices as well as android-mts." am: aac9b2a3dd

Original change: https://android-review.googlesource.com/c/platform/external/libtextclassifier/+/1531241

Change-Id: I5687599a8feb8a93a60a7bc31ef87b30a8537401