DO NOT MERGE - Run the task manager service at startup

Also moves most of it into android.app.task rather than android.content.

(Cherrypick from master)

Change-Id: Ic07a664bf54bc3e40aa0b892946edba4bf37262a
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index de46b16..bc34e0e 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -83,6 +83,7 @@
 import com.android.server.search.SearchManagerService;
 import com.android.server.statusbar.StatusBarManagerService;
 import com.android.server.storage.DeviceStorageMonitorService;
+import com.android.server.task.TaskManagerService;
 import com.android.server.trust.TrustManagerService;
 import com.android.server.tv.TvInputManagerService;
 import com.android.server.twilight.TwilightService;
@@ -132,6 +133,8 @@
             "com.android.server.hdmi.HdmiCecService";
     private static final String ETHERNET_SERVICE_CLASS =
             "com.android.server.ethernet.EthernetService";
+    private static final String TASK_SERVICE_CLASS =
+            "com.android.server.task.TaskManagerService";
 
     private final int mFactoryTestMode;
     private Timer mProfilerSnapshotTimer;
@@ -831,6 +834,8 @@
 
             mSystemServiceManager.startService(UiModeManagerService.class);
 
+            mSystemServiceManager.startService(TaskManagerService.class);
+
             if (!disableNonCoreServices) {
                 try {
                     if (pm.hasSystemFeature(PackageManager.FEATURE_BACKUP)) {