VTS: Remove enforce codec2 on ATV for S devices

Allow ATV devices to pass codec2 check if launched
with Android S or earlier. Codec2 support is only
mandatory for Android T on Android TV.

Bug: 226932158
Test: atest StoreHidlTest

Signed-off-by: Derek Smith <dpsmith@google.com>
Change-Id: I67a855108191da96810ea23c821d8a80752862e7