T368326-update-metrics-platform-to-accept-experiment-membership

Update Metrics Platform Client Libraries to accept experiment membership.

• getCurrentUserExperiments() has been added to get all details about the current user experiment membership to be able to add that data to the new experiments fragment we added to the web base schema (1.3.0)
• isCurrentUserEnrolled(experimentName) allows to know whether or not an user is enrolled in a specific experiment. It's a function that developers will be able to use throw EventLogging to know that (it was defined according to the current MPIC alpha plan scope where a simple instrument is being built with two different buckets: true or false)

Bug: T368326