Fix RcsManager and add empty RcsThread class

This change fixes the RcsManager setup and adds an empty RcsThread class. Please see go/rcs-in-telephony-doc for details.

Test: Builds fine
Bug: 109759350
Change-Id: Ie3fe476ab11d515ffab6dcc6ccf5ec801a4c9057

core/java/android/app/SystemServiceRegistry.java

@@ -152,6 +152,7 @@ import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.telephony.euicc.EuiccCardManager;
 import android.telephony.euicc.EuiccManager;
+import android.telephony.rcs.RcsManager;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.view.ContextThemeWrapper;
@@ -546,6 +547,14 @@ final class SystemServiceRegistry {
                 return new SubscriptionManager(ctx.getOuterContext());
             }});
 
+        registerService(Context.TELEPHONY_RCS_SERVICE, RcsManager.class,
+                new CachedServiceFetcher<RcsManager>() {
+                    @Override
+                    public RcsManager createService(ContextImpl ctx) {
+                        return new RcsManager();
+                    }
+                });
+
         registerService(Context.CARRIER_CONFIG_SERVICE, CarrierConfigManager.class,
                 new CachedServiceFetcher<CarrierConfigManager>() {
             @Override

core/java/android/content/Context.java

@@ -4366,6 +4366,13 @@ public abstract class Context {
      */
     public static final String APP_BINDING_SERVICE = "app_binding";
 
+    /**
+     * Use with {@link #getSystemService(String)} to retrieve an
+     * {@link android.telephony.rcs.RcsManager}.
+     * @hide
+     */
+    public static final String TELEPHONY_RCS_SERVICE = "ircs";
+
     /**
      * Determine whether the given permission is allowed for a particular
      * process and user ID running in the system.