Sepolicy: Add legacy sepolicy rule for BT

- Remove vendor_bluetooth_prop rule for unused wcnss_filter
  & hal_audio
- Add persist.vendor.qcom.bluetooth. &
  vendor.qcom.bluetooth. into vendor_bluetooth_prop context.
- Add SE policy for BT configstore.
- set vendor BT properties from vendor_init.

Change-Id: I9bb5277554363f981c7a639dc00c93b609423acb