Merge "Limit the UserPackage cache size." into udc-dev am: 1d837f7f am: 22fbf4b7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21611149



Change-Id: I72862e8a3123d463bf7f5f0f9832e21d885f02df
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>