CEC: Do not publish the service if native/HAL is not ready

This helps detect the issue sooner by checking the availability
of the service and avoid crashing at a later point.

Bug: 17897529
Change-Id: Iab0eeffb00221e5a7e6e36d446eeef7c92da1f82
diff --git a/services/core/java/com/android/server/tv/TvInputHardwareManager.java b/services/core/java/com/android/server/tv/TvInputHardwareManager.java
index 7d72a2e..44e4ad1 100644
--- a/services/core/java/com/android/server/tv/TvInputHardwareManager.java
+++ b/services/core/java/com/android/server/tv/TvInputHardwareManager.java
@@ -122,6 +122,8 @@
                 } catch (RemoteException e) {
                     Slog.w(TAG, "Error registering listeners to HdmiControlService:", e);
                 }
+            } else {
+                Slog.w(TAG, "HdmiControlService is not available");
             }
         }
     }