add api to log BinaryPushStateChanged atom

This api is to log BinaryPushStateChanged.
Experiment id is added as a binary blob that is not expected to be
accessed on device side.
This cl is mainly for API.
Will add follow up cls for persisting train info on disk and make puller
for it.
Will address sepolicy in follow up cls.

Bug: 119633962
Bug: 119685453
Test: will add gts
Change-Id: I68b4246cf7e8079155e16121ca37a312b35a5328