update wifi unit test scripts

Need to add "--no-hidden-api-checks" to unit test scripts.

Verified by running both runtests and coverage scripts

Bug: 78465388
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: adb shell am instrument -e coverage true --no-hidden-api-checks -w 'com.android.server.wifi.test/com.android.server.wifi.CustomTestRunner'
Change-Id: Ice1b62ce035c52d159d9fc2cc83dd5c962cd490f
2 files changed