Change default units to be consistent in DefaultProperties.json

Bug: 259879204
Test: atest CarPropertyManagerTest
Change-Id: I752632f4965b523fc16e438dffc8636244a6e23d
diff --git a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
index bd80ad5..95327a3 100644
--- a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
+++ b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
@@ -123,7 +123,7 @@
             "property": "VehicleProperty::VEHICLE_SPEED_DISPLAY_UNITS",
             "defaultValue": {
                 "int32Values": [
-                    "VehicleUnit::KILOMETERS_PER_HOUR"
+                    "VehicleUnit::MILES_PER_HOUR"
                 ]
             },
             "configArray": [
@@ -1556,7 +1556,7 @@
             "property": "VehicleProperty::FUEL_VOLUME_DISPLAY_UNITS",
             "defaultValue": {
                 "int32Values": [
-                    "VehicleUnit::LITER"
+                    "VehicleUnit::US_GALLON"
                 ]
             },
             "configArray": [