LE_SCAN: Add more information to scanner dumpsys

* Include AddressType, IRK length, first byte of IRK
* Include more information for scan settings

Bug: 195318725
Test: make, BluetoothInstrumentationTests, flash and scan
Tag: #logging
Ignore-AOSP-First: Fix bugs in earlier release
Change-Id: I03e6b096226d5333772685293d855fd71339b47c