beyondx: Replace BTM_DEF_LOCAL_NAME with a sysprop

Change-Id: I2c90efac01e61500eb1be23bb0ae6f96c2acdc53
diff --git a/vendor.prop b/vendor.prop
index a8e8bcc..60bf35c 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -1,2 +1,5 @@
+## Bluetooth
+bluetooth.device.default_name=Galaxy S10 5G
+
 ## RIL
 ro.telephony.default_network=26,9