Add VINTF declaration for ISecureStorage am: 11eec10630 am: 7628949844

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3532772

Change-Id: I2e5ec2b9e2d97da6ec02b519d70e6c55bace1613
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>