Create VTS folder and put necessary setup code

This change contains minimal modifications to perform test for
1.1 HAL. Test cases that exercise 1.1 HAL will be provideded
in follow-up patches.

Test: atest VtsHalTetheroffloadControlV1_1TargetTest
Bug: 149467454
Bug: 170699770
Bug: 170179169

Change-Id: I1df5b8d1241e9fd21930f0def395f98a8bbf3076