Merge "Log the cached app high watermark" into udc-dev am: 4eb6f77e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22500512



Change-Id: I940fd80a38fed0582fad4a57bbe8ac43ca79a3b4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>