Use correct typed values BTM_BLE

BTM_BLE_CONNECT_EVT == BTM_BLE_ADV_IND_EVT == 0

btm_cb.ble_ctr_cb.inq_var.directed_conn

Towards readable code

Bug: 163134718
Tag: #refactor
Test: compile & verify basic functions working
Change-Id: I88ee710608613a840e0347e9b7dcd9e3ede667f5