Merge "CAS: Add missing @hide annotations" am: 3d4c5a4464

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2361674

Change-Id: I2dfe1a6c64711aa68e0a89b0c6288c10fb3923d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>