audio: Skip AudioModuleRemoteSubmixTest on Android U

This test was developed after Android U was cut, and it assumes
the new way of encoding of the remote submix device type.

Bug: 300181540
Test: run `atest VtsHalAudioCoreTargetTest` on UDC GSI
Change-Id: If53f92a55734e18a2acce6c790f9e5e259246684
1 file changed