Use updated atom name

The JankFrameCountByWidet atom has been renamed to
JankFrameCountByWidgetReported. This change updates the data processor
to use the new name.

Bug: 371002691
Flag: android.app.jank.detailed_app_jank_metrics_api
Test: full build
Change-Id: I4340384c99b6ea77138b7f56793b17a75713e5e6