Support PER_DISPLAY_BRIGHTNESS.

For MD target PER_DISPLAY_BRIGHTNESS must be supported. For non-md
target, PER_DISPLAY_BRIGHTNESS is also supported but optional. Because
we only have one reference config, we support PER_DISPLAY_BRIGHTNESS.

In reality, this property is doing nothing other than storing the value
into memory map.

Flag: EXEMPT HAL change
Test: Manual test on gcar_md
Bug: 356419293
Change-Id: I7c5c412bd58b25478336c82a47ea2ee0b774335e
diff --git a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
index 2d1e9ab..489d638 100644
--- a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
+++ b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
@@ -3195,19 +3195,22 @@
             }
         },
         {
-            "property": "VehicleProperty::DISPLAY_BRIGHTNESS",
+            "property": "VehicleProperty::PER_DISPLAY_BRIGHTNESS"
+        },
+        {
+            "property": "VehicleProperty::PER_DISPLAY_MAX_BRIGHTNESS",
             "defaultValue": {
                 "int32Values": [
+                    0,
+                    100,
+                    1,
+                    100,
+                    2,
+                    100,
+                    3,
                     100
                 ]
-            },
-            "areas": [
-                {
-                    "areaId": 0,
-                    "minInt32Value": 0,
-                    "maxInt32Value": 100
-                }
-            ]
+            }
         },
         {
             "property": "VehicleProperty::VALET_MODE_ENABLED",
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
index 54dcca2..e182f1c 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -1047,6 +1047,10 @@
     VhalResult<void> isAdasPropertyAvailableResult;
     VhalResult<bool> isCruiseControlTypeStandardResult;
     switch (propId) {
+        case toInt(VehicleProperty::DISPLAY_BRIGHTNESS):
+        case toInt(VehicleProperty::PER_DISPLAY_BRIGHTNESS):
+            ALOGD("DISPLAY_BRIGHTNESS: %s", value.toString().c_str());
+            return {};
         case toInt(VehicleProperty::AP_POWER_STATE_REPORT):
             *isSpecialValue = true;
             return setApPowerStateReport(value);