Skip secure decoders in C2 VTS

Test: vts-tradefed run vts -m VtsHalMediaC2V1_0Host

Bug: 136725027

Change-Id: I78e141c04890ab153135a7cc948e2b7dc4897787
(cherry picked from commit 2cd83c9fbbd286768999ade97f7fce4b409b06c4)
1 file changed