btm_initiate_inquiry() function

* Function btm_initiate_inquiry * Description This function is called to start an inquiry or periodic inquiry * upon completion of the setting and/or clearing of the inquiry filter. * Inputs: p_inq (btm_cb.btm_inq_vars) - pointer to saved inquiry information * mode - GENERAL or LIMITED inquiry * duration - length in 1.28 sec intervals (If '0', the inquiry is CANCELLED) * max_resps - maximum amount of devices to search for before ending the inquiry * filter_cond_type - BTM_CLR_INQUIRY_FILTER, BTM_FILTER_COND_DEVICE_CLASS, or * BTM_FILTER_COND_BD_ADDR * filter_cond - value for the filter (based on filter_cond_type) * Returns If an error occurs the initiator's callback is called with the error status.