Allow uninstantiated netd HIDL tests

Now that we use the AIDL netd interface, some devices don't have the
HIDL interface declared. Allow the test to run with no HIDL interfaces
declared.

Test: atest VtsHalNetNetdV1_0TargetTest VtsHalNetNetdV1_1TargetTest
Bug: 264223891
Bug: 264223931
Change-Id: I7ad53380063f0368e610826383b57a622f36a121
2 files changed