Retain identity address LE-only devices on BT restart

Native stack reports the identity address of the bonded devices to the RemoteDevices before reporting device properties on BT restart. In absence of existing device properties, RemoteDevices ignores the identity address callback. Thus the identity address is lost on BT restart.
This change ensures that device properties are added if they are missing in such cases.

Change-Id: I04714a153eacdd0678389c649f9ae6a93b854d18
Test: mmm packages/modules/Bluetooth
Test: Manual | Restart BT and check identity address of LE-only devices in the bonded devices list in the bluetooth_manager dumpsys
Flag: com.android.bluetooth.flags.identity_retention_on_restart
Bug: 381930737
Bug: 383879096