WifiApConfigVerificationTest: valid min len ssid

When testing a random (valid) SSID, make sure the minimum length is
honored to avoid failing the test.

Bug: 64619701
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: I90e9e601356c184dc5a1623f74873189a0bbf5de
1 file changed