audio: Add test configs for effects VTS tests

The main purpose of the config is to shut down the framework
audioserver while the VTS test is running. This is achieved by
setting 'vts.native_server.on' to '1'. Without this, restarts
of the effects HAL process which are a normal part of tests
affect the audioserver and may lead to failures of framework
tests that run interleaved with these VTS tests.

Bug: 264712385
Test: atest --test-mapping hardware/interfaces/audio/aidl/vts
Change-Id: I2515cb62e46ef8e93cbddb2c0219f4523d2ecda5