Check Media c2 AIDL flag only for older devices

For new devices targeting 202404 vendor level, they must use AIDL, so we
shouldn't get the framework readiness on an aconfig flag for those
devices.
Cuttlefish is the only device targeting 202404 at this time.

Test: lunch aosp_cf_x86_64_phone-trunk-userdebug && launch_cvd
Test: make sure media C2 AIDL is being used
Test: lunch aosp_cf_x86_64_phone-next-userdebug && launch_cvd
Test: atest CtsMediaCodecTestCases
Bug: 218588089

Change-Id: I9358354ce4c710006034bf11fa4c04131714dfa7