[wifi_test_utils] Add wait_time param for validate_connection

validate_connection() is called to verify internet connectivity after
wifi_connect(). The APs in the testbed are sometimes slow in configuring
the dhcp server and assigning IPs to the client. wait_time of 10 seconds
is added to ensure the dhcp is up

Bug: 138751861
Test: Verified the changes
Change-Id: Id6e384734e224b63ed3156047b19f7d169626f93
1 file changed
tree: 7242920d83ff31997bd95436a10eca443134e558
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg