Add HW_KEY_INPUT to DefaultVehicleHal

Having this property available allows one to simulate key events via Vhal Emulator for testing/debugging purposes

Test: manual
Exempt-From-Owner-Approval: CL against code owned by Automotive team
Change-Id: I1de84c616c6611b8562f9c4442195829869f224d
(cherry picked from commit cbc10191c3d56490a646a472635e8babc397cb44)
diff --git a/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h b/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
index 857efca..71601a0 100644
--- a/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
+++ b/automotive/vehicle/2.0/default/impl/vhal_v2_0/DefaultConfig.h
@@ -227,6 +227,14 @@
 
     {.config =
          {
+             .prop = toInt(VehicleProperty::HW_KEY_INPUT),
+             .access = VehiclePropertyAccess::READ,
+             .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+         },
+     .initialValue = {.int32Values = {0, 0, 0}}},
+
+    {.config =
+         {
              .prop = toInt(VehicleProperty::HVAC_POWER_ON),
              .access = VehiclePropertyAccess::READ_WRITE,
              .changeMode = VehiclePropertyChangeMode::ON_CHANGE,