Remove wildcard from ART tests' OWNERS file. This is in line with the policy to tighten ART's OWNERS file in general (see e.g. https://android-review.googlesource.com/c/platform/art/+/1757576/). (cherry picked from commit c29cd1fb55b050510bdf5f239c37b479e3b39655) Test: build/make/tools/checkowners.py -c art/test/OWNERS Bug: 193029862 Change-Id: I67b1b9a0f34228df0c06c4f1cbc65af26e09979d Merged-In: I67b1b9a0f34228df0c06c4f1cbc65af26e09979d