Do not skip failing Audio vts tests

Previously failing tests were commented because I thought
our implementation had to pass all tests.

As a mater of facts, it is not the case and tests are allowed to fail.
Bugs will be raised for those failure.
This is much better way to track the fixes that FIXMEs.

Test: run the corresponding vts test
Test: vts-tradefed r vts-hal-hidl -m VtsHalAudioV2_0Target

Bug: 34170075
Change-Id: I928cae712a1cb4411f907b3a9583014ba6487abd
Signed-off-by: Kevin Rocard <krocard@google.com>