Limit build visibility of modules in apex/... am: 096a1756fb am: 285c6a2018

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1566279

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic00979a482e8ae725a57dee8c0e59b8dd296cad6