Adding initial implementation of Prediction client/service API

Test: Build sample app, ensure that app prediction service gets client
      requests
Bug: 111701043
Change-Id: I33aceb2de31552b2d740dc333559d68728753e40
Signed-off-by: Winson Chung <winsonc@google.com>
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 4326c39..ced4261 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -260,6 +260,8 @@
             "com.android.server.accessibility.AccessibilityManagerService$Lifecycle";
     private static final String ADB_SERVICE_CLASS =
             "com.android.server.adb.AdbService$Lifecycle";
+    private static final String APP_PREDICTION_MANAGER_SERVICE_CLASS =
+            "com.android.server.appprediction.AppPredictionManagerService";
 
     private static final String PERSISTENT_DATA_BLOCK_PROP = "ro.frp.pst";
 
@@ -1153,6 +1155,11 @@
 
             startContentCaptureService(context);
 
+            // App prediction manager service
+            traceBeginAndSlog("StartAppPredictionService");
+            mSystemServiceManager.startService(APP_PREDICTION_MANAGER_SERVICE_CLASS);
+            traceEnd();
+
             // NOTE: ClipboardService indirectly depends on IntelligenceService
             traceBeginAndSlog("StartClipboardService");
             mSystemServiceManager.startService(ClipboardService.class);