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

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

Change-Id: I6f3bf38f736d9ee3545ff6accc47112f64fc3e71
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>