[API Feedback] Rename DebugEventReporter

To address concerns that the DebugEventReporter would
be misconstrued as a generic logging mechanism, for
which use of system broadcasts is inappropriate, this
component and the accompanying broadcast are renamed
as AnomalyReporter and the event renamed from
ACTION_DEBUG_EVENT to ACTION_ANOMALY_REPORTED.

Bug: 126178766
Test: manual (fire event from PhoneGlobals at boot).
Change-Id: I13381d6c551db161d9858601df8be98f5c25976c