Add validation on sdp attributes in bta_dm_disc.cc

Originally in bta_dm_act.cc, moved to bta_dm_disc.cc

Bug: 263958603
Test: atest bt_host_test_bta
Ignore-AOSP-First: security
Tag: #security
Merged-In: I2aaadea6ce65f5fce2c9a7a2d66ee704e2fd5949
(cherry picked from commit ed3d8638)
Change-Id: I7bdf55320e7582cf2663a640bcaf071d06ee156f