Merge "Count the number of dropped events due to rate limiting and attach that...

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

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



Change-Id: I7f717fa0bfdc6f18cf0b624c2ccc9d1b5ecdf5ef
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>