Clarify new Choreographer Android 13 NDK docs. am: a4aba5d7dd am: cb6fcd154a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/19775140

Change-Id: I396c00f0b06c43269d58d2c1920af185d7ae4815
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>