L2CAP: Add test for L2CAP 2/7 Support of command information response

Add test case L2CAP/COS/IEX/BV-02-C in origin test case for
L2CAP/COS/IEX/BV-02-C test_query_for_1_2_features since these two can be
done in one connection setup procedure

Add following test scripts in pts_l2cap_test:
  test_L2CAP_IEX_BV_01_C
  test_L2CAP_IEX_BV_02_C

Bug: 149468215
Test: run_cert.sh
Change-Id: Icbc727b95b18316d33bddbe2690841ac4e1cc308