Fix process source propagation for binder calls stats settings so that

it is correctly reported in the pushed atom BinderLatencyReported.

This is a direct cherrypick from sc-dev: https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/15054863

Bug: 180584913
Test: unit test
Change-Id: Ifbdd96c73276546fb2a05213f71e1de088e1fe1e
Merged-In: Ifbdd96c73276546fb2a05213f71e1de088e1fe1e