Merge changes from topic "wait-for-aidl" into stage-aosp-master

* changes:
  PowerManagerService: use waitForService.
  ServiceManagerProxy: add APIs.

core/java/android/os/ServiceManagerNative.java

@@ -76,6 +76,16 @@ class ServiceManagerProxy implements IServiceManager {
         return mServiceManager.listServices(dumpPriority);
     }
 
+    public void registerForNotifications(String name, IServiceCallback cb)
+            throws RemoteException {
+        throw new RemoteException();
+    }
+
+    public void unregisterForNotifications(String name, IServiceCallback cb)
+            throws RemoteException {
+        throw new RemoteException();
+    }
+
     /**
      * Same as mServiceManager but used by apps.
      *

services/core/jni/com_android_server_power_PowerManagerService.cpp

@@ -201,13 +201,8 @@ sp<ISystemSuspend> getSuspendHal() {
 sp<ISuspendControlService> getSuspendControl() {
     static std::once_flag suspendControlFlag;
     std::call_once(suspendControlFlag, [](){
-        while(gSuspendControl == nullptr) {
+        gSuspendControl = waitForService<ISuspendControlService>(String16("suspend_control"));
-            sp<IBinder> control =
+        LOG_ALWAYS_FATAL_IF(gSuspendControl == nullptr);
-                    defaultServiceManager()->getService(String16("suspend_control"));
-            if (control != nullptr) {
-                gSuspendControl = interface_cast<ISuspendControlService>(control);
-            }
-        }
     });
     return gSuspendControl;
 }