Migrate frameworks/base/wifi to androidx.test

See go/jetpack-test-android-migration

Test: make checkbuild
Change-Id: Ia0461fe59f3bf847e5c3edd13948b1688274c876
diff --git a/wifi/tests/runtests.sh b/wifi/tests/runtests.sh
index 4e52b8f..2caf8a5 100755
--- a/wifi/tests/runtests.sh
+++ b/wifi/tests/runtests.sh
@@ -22,4 +22,4 @@
 adb install -r -g "$OUT/data/app/FrameworksWifiApiTests/FrameworksWifiApiTests.apk"
 
 adb shell am instrument --no-hidden-api-checks -w "$@" \
-  'android.net.wifi.test/android.support.test.runner.AndroidJUnitRunner'
+  'android.net.wifi.test/androidx.test.runner.AndroidJUnitRunner'