Fix build.

Change-Id: Ib0b9ffb9cbf53df3d76b8de6619d09ba18b4d345
diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
index 39ebdfc..6282fe5 100644
--- a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
@@ -145,4 +145,9 @@
     public void boostScreenBrightness(long time) throws RemoteException {
         // pass for now.
     }
+
+    @Override
+    public boolean isDeviceIdleMode() throws RemoteException {
+        return false;
+    }
 }