Skip WiFi access in CtsJobSchedulerTestCases module if feature not supported

Test cases are using wifi manager instance which is null when WiFi feature not enabled.
This change stops the test from accessing Wifi Manager based on WiFi feature availabiliy.

Bug: 262228635
Test: Executed all CtsJobSchedulerTestCases tests on system with and without WiFi feature
Change-Id: Ie8a1be3cc338c7ac053144faa5eeea9bae99f70e
1 file changed