profcollectd: Provide clearer messaging when daemon is not running

Instead of crashing, now outputs:
  $ profcollectctl once
  Trace once
  Error: Failed to trace.

  Caused by:
      0: Failed to get profcollectd binder service, is profcollectd running?
      1: StatusCode::NAME_NOT_FOUND

Test: manual
Change-Id: Id46c8504e1a4ab2537b37c8d927d1abd9a997443
1 file changed