PBAP-C: Add support for dynamic SDP record creation

This patch adds support for dynamic creation of PBAP Client SDP
record. Without this patch it is not possible to add pbap client
sdp record when pbap client test application is launched, leading
to BT spec violation and resulting in PTS IOPT test case TP/SDSS/BV-02
to fail.

Change-Id: I67abb0d20f2184f1255fe442523115c113bca7f3