Add constants "short service" foreground service

Aslo add the timeout callback.

All APIs are still hidden.

Bug: 257270313
Test: Build
Change-Id: I9868de22a343e97c83cc2524cf81aec159aa62ab

core/java/android/app/Service.java

@@ -1053,4 +1053,16 @@ public abstract class Service extends ContextWrapper implements ComponentCallbac
             return sStartForegroundServiceStackTraces.get(className);
         }
     }
+
+    /**
+     * Callback called on timeout for {@link ServiceInfo#FOREGROUND_SERVICE_TYPE_SHORT_SERVICE}.
+     *
+     * TODO Implement it
+     * TODO Javadoc
+     *
+     * @param startId
+     * @hide
+     */
+    public void onTimeout(int startId) {
+    }
 }

core/java/android/content/pm/ServiceInfo.java

@@ -363,6 +363,28 @@ public class ServiceInfo extends ComponentInfo
     )
     public static final int FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED = 1 << 10;
 
+    /**
+     * Foreground service type corresponding to {@code shortService} in
+     * the {@link android.R.attr#foregroundServiceType} attribute.
+     *
+     * TODO Implement it
+     *
+     * TODO Expand the javadoc
+     *
+     * This type is not associated with specific use cases unlike other types, but this has
+     * unique restrictions.
+     * <ul>
+     *     <li>Has a timeout
+     *     <li>Cannot start other foreground services from this
+     *     <li>
+     * </ul>
+     *
+     * @see Service#onTimeout
+     *
+     * @hide
+     */
+    public static final int FOREGROUND_SERVICE_TYPE_SHORT_SERVICE = 1 << 11;
+
     /**
      * Constant corresponding to {@code specialUse} in
      * the {@link android.R.attr#foregroundServiceType} attribute.
@@ -446,6 +468,7 @@ public class ServiceInfo extends ComponentInfo
             FOREGROUND_SERVICE_TYPE_HEALTH,
             FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING,
             FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED,
+            FOREGROUND_SERVICE_TYPE_SHORT_SERVICE,
             FOREGROUND_SERVICE_TYPE_SPECIAL_USE
     })
     @Retention(RetentionPolicy.SOURCE)
@@ -528,6 +551,8 @@ public class ServiceInfo extends ComponentInfo
                 return "remoteMessaging";
             case FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED:
                 return "systemExempted";
+            case FOREGROUND_SERVICE_TYPE_SHORT_SERVICE:
+                return "shortService";
             case FOREGROUND_SERVICE_TYPE_SPECIAL_USE:
                 return "specialUse";
             default:

core/res/res/values/attrs_manifest.xml

@@ -1704,6 +1704,12 @@
             {@link android.content.pm.ServiceInfo#FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED}.
         -->
         <flag name="systemExempted" value="0x400" />
+        <!-- "Short service" foreground service type. See
+           TODO: Change it to a real link
+           {@code android.content.pm.ServiceInfo#FOREGROUND_SERVICE_TYPE_SHORT_SERVICE}.
+           for more details.
+        -->
+        <flag name="shortService" value="0x800" />
         <!-- Use cases that can't be categorized into any other foreground service types, but also
             can't use @link android.app.job.JobInfo.Builder} APIs.
             See {@link android.content.pm.ServiceInfo#FOREGROUND_SERVICE_TYPE_SPECIAL_USE} for the