DO NOT MERGE AVRC: Copy browse.p_browse_data in btif_av_event_deep_copy

p_msg_src->browse.p_browse_data is not copied, but used after the
original pointer is freed

Bug: 109699112
Test: manual
Change-Id: I1d014eb9a8911da6913173a9b11218bf1c89e16e
(cherry picked from commit 1d9a58768e6573899c7e80c2b3f52e22f2d8f58b)

uint8_t btif_av_get_peer_sep(void) { return btif_av_cb.peer_sep; }

uint8_t btif_av_get_peer_sep(void) { return btif_av_cb.peer_sep; }
