Merge "Use empty string instead of nullable for leak report email" into...

Merge "Use empty string instead of nullable for leak report email" into udc-dev am: 3b0d3685 am: 38d9276e am: 641feb32 am: dc69b73e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23067598



Change-Id: I8ac891e059c4ce39e55a55cc1f0e8018ce1d7ca1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>