Merge "Create BinderLatencyObserver to collect binder call latency stats. Pushing these as a metric will come in a future change." am: 60cd2fa626

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1697178

Change-Id: I025d7728e7cc5dd6a3491d254013f7832ea4b01d