Switch to AIDL and add sepolicy for bluetooth extension

Bug: 274906319
Bug: 278978409
Test: build pass
Change-Id: I4430575deaf572db5dbc855d85bea0c856e0c914
diff --git a/bcmbt/sepolicy/service.te b/bcmbt/sepolicy/service.te
new file mode 100644
index 0000000..b8403da
--- /dev/null
+++ b/bcmbt/sepolicy/service.te
@@ -0,0 +1,2 @@
+# Bluetooth HAL extension
+type hal_bluetooth_coexistence_service, hal_service_type, service_manager_type;