Fixed EmulatedUserHal::get(USER_IDENTIFICATION_ASSOCIATION).

It must set the requestId in the response.

Test: adb shell lshal debug android.hardware.automotive.vehicle@2.0::IVehicle/default --set 299896587 a 1 i 666 i 1 i 1 i 2 && \
      adb shell cmd car_service get-user-auth-association --hal-only KEY_FOB
Fixes: 159497444
Bug: 159498909

Change-Id: Ib3f87b45714883c3e5b72464813df24ec4124dbb