Add dumpsys to GameManagerService

Implement dump() for GameManagerService that enables output information
to dumpsys. Currently there is only one option that outputs all
installed games' configurations.

Bug: b/204322735
Test: m && flash
      adb shell dumpsys game
Change-Id: I017238969c3d7680cebcd6da5fb8a8e175c844fd

services/core/java/com/android/server/app/GameManagerService.java

@@ -86,6 +86,7 @@ import com.android.server.SystemService.TargetUser;
 import com.android.server.app.GameManagerService.GamePackageConfiguration.GameModeConfiguration;
 
 import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.util.List;
 
 /**
@@ -148,6 +149,29 @@ public final class GameManagerService extends IGameManagerService.Stub {
         new GameManagerShellCommand().exec(this, in, out, err, args, callback, result);
     }
 
+    @Override
+    public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
+        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
+                != PackageManager.PERMISSION_GRANTED) {
+            writer.println("Permission Denial: can't dump GameManagerService from from pid="
+                    + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()
+                    + " without permission " + android.Manifest.permission.DUMP);
+            return;
+        }
+        if (args == null || args.length == 0) {
+            writer.println("*Dump GameManagerService*");
+            dumpAllGameConfigs(writer);
+        }
+    }
+
+    private void dumpAllGameConfigs(PrintWriter pw) {
+        final int userId = ActivityManager.getCurrentUser();
+        String[] packageList = getInstalledGamePackageNames(userId);
+        for (final String packageName : packageList) {
+            pw.println(getInterventionList(packageName));
+        }
+    }
+
     class SettingsHandler extends Handler {
 
         SettingsHandler(Looper looper) {
@@ -1236,8 +1260,7 @@ public final class GameManagerService extends IGameManagerService.Stub {
                     .append(packageName);
             return listStrSb.toString();
         }
-        listStrSb.append("\nPackage name: ")
-                .append(packageName)
+        listStrSb.append("\n")
                 .append(packageConfig.toString());
         return listStrSb.toString();
     }