Framework for the anomaly detection.

This cl adds the following components for anomaly dection:
1. AnomalyLoader: run all the anomaly checks in the background
2. Anomaly: Data class to represent what anomaly it is
3. Detector: Different kinds of anomaly detector with common interface
4. Action:  Suggestions when facing anomaly(Force stop, uninstall)
5. AnomalyDialogFragment: show the confirm dialog for action
6. AnomalyPreferenceController: handle update and click for
anomalyPreference, since it will be used in multiple fragments.
7. AnomalyUtils: utility class for anomaly

This cl also adds skeleton for the wakelock check and action. Following
cls will add real implementation about it.

Bug: 36924669
Test: RunSettingsRoboTests
Change-Id: I89fc4b6963757869b93791b4275ca53c04ab9604

src/com/android/settings/fuelgauge/anomaly/AnomalyDialogFragment.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge.anomaly;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.support.annotation.VisibleForTesting;
+
+import com.android.settings.R;
+import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+import com.android.settings.fuelgauge.anomaly.action.AnomalyAction;
+
+/**
+ * Dialog Fragment to show action dialog for each anomaly
+ */
+public class AnomalyDialogFragment extends InstrumentedDialogFragment implements
+        DialogInterface.OnClickListener {
+
+    private static final String ARG_ANOMALY = "anomaly";
+
+    @VisibleForTesting
+    Anomaly mAnomaly;
+
+    /**
+     * Listener to give the control back to target fragment
+     */
+    public interface AnomalyDialogListener {
+        /**
+         * This method is invoked once anomaly is handled, then target fragment could do
+         * extra work. One example is that fragment could remove the anomaly preference
+         * since it has been handled
+         *
+         * @param anomaly that has been handled
+         */
+        void onAnomalyHandled(Anomaly anomaly);
+    }
+
+    public static AnomalyDialogFragment newInstance(Anomaly anomaly) {
+        AnomalyDialogFragment dialogFragment = new AnomalyDialogFragment();
+
+        Bundle args = new Bundle(1);
+        args.putParcelable(ARG_ANOMALY, anomaly);
+        dialogFragment.setArguments(args);
+
+        return dialogFragment;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        // TODO(b/37681923): add anomaly metric id
+        return 0;
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        final AnomalyDialogListener lsn = (AnomalyDialogListener) getTargetFragment();
+        if (lsn == null) {
+            return;
+        }
+
+        final AnomalyAction anomalyAction = AnomalyUtils.getAnomalyAction(mAnomaly.type);
+        anomalyAction.handlePositiveAction(mAnomaly.packageName);
+        lsn.onAnomalyHandled(mAnomaly);
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final Bundle bundle = getArguments();
+        mAnomaly = bundle.getParcelable(ARG_ANOMALY);
+
+        final Context context = getContext();
+        final AnomalyAction anomalyAction = AnomalyUtils.getAnomalyAction(mAnomaly.type);
+        switch (anomalyAction.getActionType()) {
+            case Anomaly.AnomalyActionType.FORCE_STOP:
+                return new AlertDialog.Builder(context)
+                        .setTitle(R.string.force_stop_dlg_title)
+                        .setMessage(R.string.force_stop_dlg_text)
+                        .setPositiveButton(R.string.dlg_ok, this)
+                        .setNegativeButton(R.string.dlg_cancel, null)
+                        .create();
+            default:
+                throw new IllegalArgumentException("unknown type " + mAnomaly.type);
+        }
+    }
+
+}