SDP: Include the offset in sdp_disc_server_rsp

The commit
  SDP: Pass the bounds to process_service_*_rsp
with the change ID
  Icf53d4d05f99b5e0a2b3f4d3735b6fbfd62adaa3
omitted the offset when calculating the end of the message.

Bug: 68161546
Test: Connect a headset
Change-Id: I6266b51e3871ed6ce9932161e4ab66de90af4ce6
(cherry picked from commit 1ff9151b7de9cff6aab3919d151542e7244cc0e5)
Merged-In: I6266b51e3871ed6ce9932161e4ab66de90af4ce6
(cherry picked from commit c379fc0f7a158e7028771bcf9dea19987f771a8e)
diff --git a/stack/sdp/sdp_discovery.cc b/stack/sdp/sdp_discovery.cc
index 574f5bc..7eea5fd 100644
--- a/stack/sdp/sdp_discovery.cc
+++ b/stack/sdp/sdp_discovery.cc
@@ -225,7 +225,7 @@
 
   /* Got a reply!! Check what we got back */
   p = (uint8_t*)(p_msg + 1) + p_msg->offset;
-  uint8_t* p_end = (uint8_t*)(p_msg + 1) + p_msg->len;
+  uint8_t* p_end = p + p_msg->len;
 
   BE_STREAM_TO_UINT8(rsp_pdu, p);