Merge "Update device-entry docs + add glossary" into tm-dev am: 35772beb am: e238695b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17567678



Change-Id: I2ff83c1dee2053030ef3692097faa7433bfc8dfc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>