Convert Vehicle Property to integer

This make sense for easier extending Vehicle Hal interface
by OEMs and creating new versions.

Test: adb shell "su system /data/nativetest/android.hardware.vehicle@2.0-manager-unit-tests/android.hardware.vehicle@2.0-manager-unit-tests" ; ENABLE_TREBLE=true make vts BUILD_GOOGLE_VTS=true -j32 && vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VehicleHidlTest -l INFO

Change-Id: I02415a1c180a6d24fded48a1583f7cb150419820
Fix: b/34894217
diff --git a/vehicle/2.0/default/impl/DefaultVehicleHal.cpp b/vehicle/2.0/default/impl/DefaultVehicleHal.cpp
index 4541168..65bd49d 100644
--- a/vehicle/2.0/default/impl/DefaultVehicleHal.cpp
+++ b/vehicle/2.0/default/impl/DefaultVehicleHal.cpp
@@ -31,7 +31,7 @@
     *outStatus = StatusCode::OK;
 
     VehiclePropValuePtr v;
-    VehicleProperty property = requestedPropValue.prop;
+    auto property = static_cast<VehicleProperty>(requestedPropValue.prop);
     int32_t areaId = requestedPropValue.areaId;
     auto& pool = *getValuePool();
 
@@ -103,7 +103,7 @@
     }
 
     if (StatusCode::OK == *outStatus && v.get() != nullptr) {
-        v->prop = property;
+        v->prop = toInt(property);
         v->areaId = areaId;
         v->timestamp = elapsedRealtimeNano();
     }
@@ -112,7 +112,7 @@
 }
 
 StatusCode DefaultVehicleHal::set(const VehiclePropValue& propValue) {
-    auto property = propValue.prop;
+    auto property = static_cast<VehicleProperty>(propValue.prop);
     const auto& v = propValue.value;
 
     StatusCode status = StatusCode::OK;