resolve merge conflicts of 168dc86 to nyc-dev-plus-aosp

Change-Id: I1554cec6ea880a87921f723bc96972cb8e1d3c5c
diff --git a/libs/gui/SensorManager.cpp b/libs/gui/SensorManager.cpp
index 225bfa8..5338034 100644
--- a/libs/gui/SensorManager.cpp
+++ b/libs/gui/SensorManager.cpp
@@ -139,7 +139,7 @@
                 mSensorManager.sensorManagerDied();
             }
         public:
-            DeathObserver(SensorManager& mgr) : mSensorManager(mgr) { }
+            explicit DeathObserver(SensorManager& mgr) : mSensorManager(mgr) { }
         };
 
         LOG_ALWAYS_FATAL_IF(mSensorServer.get() == NULL, "getService(SensorService) NULL");