Merge "Add the SPA page enter/leave logging metrcis" into udc-dev am: f2de79eb am: e287459c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21793711



Change-Id: I1a6bf7e1628c8d78a42e3f239a4cf9e30c9ec1f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>