Fix VTS issue of BroadcastRadio v2.0

1. This is a patch to fix a problem that occurs when running VTS on a system composed of multiple modules such as amfm and dab.
In the case of dab, most of the OEM requirements do not include the seek function, so it may not be supported.
Even if it is supported, a problem may occur because the test case for dab tune does not exist before the seek test case.

2. To correct this, a dab tune test case has been added to the VTS code,
and in the case of a system that does not support dab seek, the seek test case has been modified to be processed as skip.

Bug: 173174410
Signed-off-by : Hyewon Eum <hyewon.eum@lge.com>

Change-Id: I28b1406a26fa66bcf972a6efd42ee76a55bae374