Merge "Clarify measurement interval documentation" into tm-dev am: 58178fd1b7 am: fc27380b8f am: f07ee740f9 am: a0ff6f0bc2

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/17988968

Change-Id: Ie7e54afff2ff2a7a5da5c4dbc9f9a8014e6f618c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>