Ensure create/destroy is called properly for Capability Exchange API

We were mistakenly not calling the destroy API properly for Capability
Exchange API when the listener passed in was null. Instead we were calling
destroy -> create. This was causing us to call destroy -> create
over 4 times when switching SIMs.

Bug: 228278638
Test: manual PUBLISH verification on TMO, atest FrameworksTelephonyTests
Change-Id: Ia9d32c6a4b3831888c5445f0b00d55ef790b2960