Save SDP information in p_scb/client_cb

To prepare for RFCOMM metrics, save relevant SDP data in a struct within
p_scb or client_cb for BTA_AG and BTA_HF_CLIENT respectively

Bug: 374989690
Test: m com.android.btservices
Flag: EXEMPT metrics no-op
Change-Id: I6d1e3dee79e230f3409fda4014dfe69e892942e0