Merge "Count the number of dropped events due to rate limiting and attach that number to the header of the dropbox entry." into tm-dev am: 48ecaf9d am: ba8ea9ba

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17619726



Change-Id: Iaad426db17d6af87316b6ae45547233ed64d6a2f
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>