Update UUIDs immediately on NVRAM

As the BTIF config updation have delay in writing items
to the NVRAM, some times there is a chance of not updating
incase of battery removal happens before the actual write onto
NVRAM.

As SDP UUIDs is important data to store, it will update
immediately onto NVRAM.

Test: manual

Change-Id: I6637dc326f3a53211a5bbf988a2dca1020203128

system/btif/src/btif_storage.cc

@@ -260,7 +260,7 @@ static int prop2cfg(bt_bdaddr_t* remote_bd_addr, bt_property_t* prop) {
 
   /* save changes if the device was bonded */
   if (btif_in_fetch_bonded_device(bdstr) == BT_STATUS_SUCCESS) {
-    btif_config_save();
+    btif_config_flush();
   }
 
   return true;