Add cts hostside tests path to known test paths am: 167a960592 am: 5f0758d5aa am: 7139009abd

Original change: https://android-review.googlesource.com/c/platform/prebuilts/checkstyle/+/1509628

Change-Id: I5c934b138d70f3642a296a4efb5f4f3e1e7061a3