native frameworks: 64-bit compile issues

- Fix format (print/scanf)
- Suppress unused argument warning messages (bonus)

Change-Id: I05c7724d2aba6da1e82a86000e11f3a8fef4e728
diff --git a/services/sensorservice/CorrectedGyroSensor.cpp b/services/sensorservice/CorrectedGyroSensor.cpp
index 31487a7..b07d544 100644
--- a/services/sensorservice/CorrectedGyroSensor.cpp
+++ b/services/sensorservice/CorrectedGyroSensor.cpp
@@ -61,7 +61,7 @@
     return mSensorFusion.activate(ident, enabled);
 }
 
-status_t CorrectedGyroSensor::setDelay(void* ident, int handle, int64_t ns) {
+status_t CorrectedGyroSensor::setDelay(void* ident, int /*handle*/, int64_t ns) {
     mSensorDevice.setDelay(ident, mGyro.getHandle(), ns);
     return mSensorFusion.setDelay(ident, ns);
 }