tests: Bluetooth: BR: Add test suite sdp_server

IUT works as a SDP Server. The peer device, SDP client, is a PC with
running `bumble` on it.

Define 10 SDP records. 8 normal SDP records. one SDP record with large
service name that cannot be discovered by peer since the data length
exceeds the MTU of SDP. And one SDP record with large service name
that can be discovered by peer but `continuation state` needs to be
involved.

By default, no SDP record will be registered.
Add shell command `register_sdp` to register specific SDP record.
Add shell command `register_sdp_all` to register all normal SDP
records.
Add shell command `register_sdp_large` to register SDP record with
large service name that cannot be discovered by peer.
Add shell command `register_sdp_large_valid` to register SDP record
with large service name that can be discovered by peer.

In the test suite, there two test cases,
Case 1, discover the IUT.
Case 2, connect to the IUT. And send serial SDP discovery requests.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>