sensorservice: switch to use sp<> in sensor list

* Switch to use smart pointer in SensorList to avoid object
  life cycle issue.
* Refactor HardwareSensor and various virtual sensor class.
* Change active virtual sensor map into a set of handles.

Change-Id: I674d5eb5c0038179f9ef1b6f0d576b8b605649ec
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index 4b9a2ab..0340d6b 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -272,6 +272,11 @@
         break;
     }
 
+    // Set DYNAMIC_SENSOR_MASK and ADDITIONAL_INFO_MASK flag here. Compatible with HAL 1_3.
+    if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
+        mFlags |= (hwSensor->flags & (DYNAMIC_SENSOR_MASK | ADDITIONAL_INFO_MASK));
+    }
+
     // Set DATA_INJECTION flag here. Defined in HAL 1_4.
     if (halVersion >= SENSORS_DEVICE_API_VERSION_1_4) {
         mFlags |= (hwSensor->flags & DATA_INJECTION_MASK);