Fix format-pedantiic warning

C++ spec requires %p format specifier to correspond to a void pointer.

Test: presubmit
Change-Id: I98c72f94b6ea73607e84f32ddcc2149331e39978
diff --git a/libs/sensor/SensorManager.cpp b/libs/sensor/SensorManager.cpp
index 96d5eb9..bf8b9f7 100644
--- a/libs/sensor/SensorManager.cpp
+++ b/libs/sensor/SensorManager.cpp
@@ -150,7 +150,7 @@
         class DeathObserver : public IBinder::DeathRecipient {
             SensorManager& mSensorManager;
             virtual void binderDied(const wp<IBinder>& who) {
-                ALOGW("sensorservice died [%p]", who.unsafe_get());
+                ALOGW("sensorservice died [%p]", static_cast<void*>(who.unsafe_get()));
                 mSensorManager.sensorManagerDied();
             }
         public: