Keystore 2.0: Use Strong<> for Rust AIDL interfaces

This updates the APC code to use &Strong<dyn IConfirmationCallback>
instead of &dyn IConfirmationCallback for AIDL interfaces.

Bug: 182890877
Test: m
Change-Id: Ia841cf22daa1ef2f497fcc9bd0bbfa649100f86e
1 file changed