mediav2 CTS: Skip codecs supporting multiple media types.

For codecs supporting mutiple codecs, the ndk codec names and the sdk
codec names are different. This cause a failure while trying to get a
codec info with AMediaCodecStore_getCodecInfo() using the sdk codec
names.

This change is a workaround before we unify the codec names.

Bug: 386996035
Test: atest NativeAMediaCodecInfoTest
Change-Id: I61c19cbc9c211833b62cbb9ed5d947de53bf5e55