Refactoring Tuner VTS frontend test part

Note that other interface tests are comment out in this CL
and will be refactored and uncomment in the CL chains.

Test: cuttlefish atest + vendor device test
Bug: 135708935
Change-Id: If831219fc588827c9367a506ba7fe7c96bea0286
(cherry picked from commit a5d00e64)