sco: Fix handling Command Status Failed.

When command status is failed, stack needs to find the SCO context which
state is SCO_ST_CONNECTING and is_orig is set to true, as this is the
one which is expecting COMMAND STATUS event.

Bug: 351301741
Bug: 358573137
Test: atest net_test_stack_btu
Flag: com.android.bluetooth.flags.fix_sco_command_status_handling
Change-Id: Ia07a98b5df7a1fd41c78e002e0083fb2d9eeaa45