Merge "Log dream_setting_changed to statsd" into udc-qpr-dev am: bd019a86 am: b4c51d64

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24136085



Change-Id: Ieb192740813e742bd2e1356eb34d368c112f6e4d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>