RESTRICT AUTOMERGE: libnativeloader_test: Skip reading VNDK libs for vendor if not available

(Using Merged-In with an ID of a recent ART CL to avoid merging into master.)

Bug: 235217081
Test: atest libnativeloader_test
Change-Id: I8e6965189e9df3ba20ff3ddc22f74f0e23e7a1ee
Merged-In: I1400a701a622f9f35b3ce0781575134faca679ae
2 files changed