Use FIELD_ANOMALY_TYPE instead of FIELD_CONTEXT

We did it for general anomaly however not the whitelisted one. This
CL fixes it.

Change-Id: I6603ffbaf1d097b360c86406ae0675bfe8a20410
Fixes: 109804858
Test: RunSettingsRoboTests

src/com/android/settings/fuelgauge/batterytip/AnomalyDetectionJobService.java

@@ -157,7 +157,7 @@ public class AnomalyDetectionJobService extends JobService {
                 metricsFeatureProvider.action(context,
                         MetricsProto.MetricsEvent.ACTION_ANOMALY_IGNORED,
                         packageName,
-                        Pair.create(MetricsProto.MetricsEvent.FIELD_CONTEXT,
+                        Pair.create(MetricsProto.MetricsEvent.FIELD_ANOMALY_TYPE,
                                 anomalyInfo.anomalyType),
                         Pair.create(MetricsProto.MetricsEvent.FIELD_APP_VERSION_CODE,
                                 versionCode));