Refactor createBondOutOfBand API with BLUETOOTH_PRIVILEGED permission

createBondOutOfBand system API is annotated with only BLUETOOTH_CONNECT permission although BLUETOOTH_PRIVILEGED permission is also enforced internally.
This change refactors createBondOutOfBand API and fixes the annotation.

Test: mmm packages/modules/Bluetooth
Test: atest PairingTest
Test: atest OobPairingTest
Flag: EXEMPT refactor
Bug: 372295458

Change-Id: I6fae8e550b76d122e01a2963d3e8cc05e2b7079a