Add requestSessionStats API. Bug: 340957759 Test: make (cherry picked from https://googleplex-android-review.googlesource.com/q/commit:cbc2aa53647d4430c85659114bf756fdf4c35020) Merged-In: I23cbadc31c48413afcdf52cc6d3768611b9df083 Change-Id: I23cbadc31c48413afcdf52cc6d3768611b9df083