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/Anomaly.java

@@ -0,0 +1,136 @@
+/*
+ * 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.os.Parcel;
+import android.os.Parcelable;
+import android.support.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Data that represents an app has been detected as anomaly. It contains
+ *
+ * 1. Basic information of the app(i.e. uid, package name)
+ * 2. Type of anomaly
+ * 3. Data that has been detected as anomaly(i.e wakelock time)
+ */
+public class Anomaly implements Parcelable {
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({AnomalyType.WAKE_LOCK})
+    public @interface AnomalyType {
+        int WAKE_LOCK = 0;
+    }
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({AnomalyActionType.FORCE_STOP})
+    public @interface AnomalyActionType {
+        int FORCE_STOP = 0;
+    }
+
+    /**
+     * Type of this this anomaly
+     */
+    public final int type;
+    public final int uid;
+    public final long wakelockTimeMs;
+
+    /**
+     * Display name of this anomaly, usually it is the app name
+     */
+    public final String displayName;
+    public final String packageName;
+
+    private Anomaly(Builder builder) {
+        type = builder.mType;
+        uid = builder.mUid;
+        displayName = builder.mDisplayName;
+        packageName = builder.mPackageName;
+        wakelockTimeMs = builder.mWakeLockTimeMs;
+    }
+
+    private Anomaly(Parcel in) {
+        type = in.readInt();
+        uid = in.readInt();
+        displayName = in.readString();
+        packageName = in.readString();
+        wakelockTimeMs = in.readLong();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(type);
+        dest.writeInt(uid);
+        dest.writeString(displayName);
+        dest.writeString(packageName);
+        dest.writeLong(wakelockTimeMs);
+    }
+
+    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
+        public Anomaly createFromParcel(Parcel in) {
+            return new Anomaly(in);
+        }
+
+        public Anomaly[] newArray(int size) {
+            return new Anomaly[size];
+        }
+    };
+
+    public static final class Builder {
+        @AnomalyType
+        private int mType;
+        private int mUid;
+        private String mDisplayName;
+        private String mPackageName;
+        private long mWakeLockTimeMs;
+
+        public Builder setType(@AnomalyType int type) {
+            mType = type;
+            return this;
+        }
+
+        public Builder setUid(int uid) {
+            mUid = uid;
+            return this;
+        }
+
+        public Builder setDisplayName(String displayName) {
+            mDisplayName = displayName;
+            return this;
+        }
+
+        public Builder setPackageName(String packageName) {
+            mPackageName = packageName;
+            return this;
+        }
+
+        public Builder setWakeLockTimeMs(long wakeLockTimeMs) {
+            mWakeLockTimeMs = wakeLockTimeMs;
+            return this;
+        }
+
+        public Anomaly build() {
+            return new Anomaly(this);
+        }
+    }
+}