Hide java.lang.ClassValue from apps targeting T or earlier Android. am: c4868668f3 am: 428b5c6381 am: 7ef5ed2b77

Original change: https://android-review.googlesource.com/c/platform/art/+/2384052

Change-Id: I3d459d38b890b577e48d8902221ab67b907d3b19
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>