Implement RCS Dedicated Bearer metrics

Implement and update to store and pull Dedicated Bearer event atoms.

This reverts commit 657fecc1.
Reason for revert: reapply original CL since dependency were resolved

BUG: 174871215
Test: atest QosCallbackTrackerTest
Change-Id: Id2478b9726ed0360a9cf35b2bbfa2a1c79491931
Merged-In: I1ef3137cea1092c2a54b6669a94631bd5350fc0f