Use appropriate authentication requirements when requesting encryption as peripheral

When requesting LE encryption with a bonded device as peripheral, we need to use the authentication requirements agreed upon during bonding.

Change-Id: I10ed093697ba9f028b77c8c8476a30aa5455ed1f
Test: mmm packages/modules/Bluetooth
Flag: com.android.bluetooth.flags.peripheral_auth_req
Bug: 384580091
Bug: 385202199