pjproject-bundled: Add upstream timer fixes

Fixed #2191:
  - Stricter double timer entry scheduling prevention.
  - Integrate group lock in SIP transport, e.g: for add/dec ref,
    for timer scheduling.

ASTERISK-28161
Reported-by: Ross Beer

Change-Id: I02a791fd1570a1e594a132b36c4ff72441108c17