Add event_value to BluetoothClassicPairingEventReported

* Add an event_value field to log status value such as
 - encryption enabled state
 - simple pairing mode
 - secure connection host support
 - delete all flag
* Use the event_value field to log above information during
  classic pairing process instead

Bug: 128966402
Test: make
Change-Id: I2a87c3837754bfc5bcd55f72325400c428c2ca25