libsnapshot: Fix vts_libsnapshot_test.SnapshotUpdateTest#FullUpdateFlow am:...

libsnapshot: Fix vts_libsnapshot_test.SnapshotUpdateTest#FullUpdateFlow am: 29971711 am: 43272903 am: 1c825541

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/19263115



Change-Id: Id38f3287018511b5091ce652e1d7b1c07a3c6b71
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>