Fix rule of three warnings

Sensor and BufferItem have destructors, the copy constructor and
assignment operators should not be implicit. The warnings were being
hidden by the use of -isystem to include frameworks/native/include.

Bug: 31752268
Test: m -j
Change-Id: If375d85cd3d6ded4ee6b27b841bf10f563254682
diff --git a/include/gui/Sensor.h b/include/gui/Sensor.h
index 094fd16..7506835 100644
--- a/include/gui/Sensor.h
+++ b/include/gui/Sensor.h
@@ -61,6 +61,9 @@
         uuid_t() : b{0} {}
     };
 
+    Sensor(const Sensor&) = default;
+    Sensor& operator=(const Sensor&) = default;
+
     Sensor(const char * name = "");
     Sensor(struct sensor_t const* hwSensor, int halVersion = 0);
     Sensor(struct sensor_t const& hwSensor, const uuid_t& uuid, int halVersion = 0);