Update makefiles for transitive interfaces.

Transitive includes accidentally added by hidl-gen
were getting added to import lists. This import isn't
actually required and is now properly excluded from
hidl-gen update makefiles.

Bug: 65055216
Test: none
Merged-In: I4fb4de8ef5547a3081cd55b3c75f6288cc518ba6
Change-Id: I4fb4de8ef5547a3081cd55b3c75f6288cc518ba6