[IStats AIDL] Added annotations for vendor atoms am: deb57805f6

Original change: https://android-review.googlesource.com/c/platform/frameworks/hardware/interfaces/+/2403576

Change-Id: I49bdc6cd399f388a88c36e331c9356771daa83c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>