Reland "Use reference counted pointers for ApkAssets" am: 1cf74939f4 am: da845a7d94

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23988011

Change-Id: I3dfc6e23ad48ebea5aee2589eb72af1302063a8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>