Add android.hardware.audio@7.0-service.example service

This service will demonstrate a minimal audio HAL V7.0

Bug: 142480271
Test: atest VtsHalAudioV7_0TargetTest
      (HAL and test are not available in AOSP yet)
Change-Id: I2e7f166a47f21eb6c8621d0ddb33cfea84aa20da
1 file changed