audio: add policy for rild to get vendor audio propery

- rild has different sepolicy for audio hal by type of service, which is
  hidl or aidl. Read property before querying service in rild can avoid
  avc denied presubmit test.

Bug: 206738075
Test: build pass with hidl/aidl audio service

Change-Id: I2616028fb3a6029646340fc3282e51a5f02b3f7f
Signed-off-by: Jasmine Cha <chajasmine@google.com>
3 files changed