create led dump

Bug: 240530709
Test: adb bugreport
Change-Id: I115e8bcaac0dd6fd20b63dd2d117d968aaa227bc

led/dump_led.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dump/pixel_dump.h>
+
+int main() {
+    dumpFileContent("Green LED Brightness", "/sys/class/leds/green/brightness");
+    dumpFileContent("Green LED Max Brightness", "/sys/class/leds/green/max_brightness");
+    dumpFileContent("LED Calibration Data", "/mnt/vendor/persist/led/led_calibration_LUT.txt");
+    return 0;
+}