Rename mBrighteningLuxThreshold to mAmbientBrighteningThreshold in ABC

log info.

the global variant mBrighteningLuxThreshold in the log info is not exist,
it's more reasonable to change mBrighteningLuxThreshold to mAmbientBrighteningThreshold.

Bug: 274655714

Test:
1. adb shell cmd display ab-logging-enable
2. adb logcat | grep updateAmbientLux

Change-Id: I88b0425b9f638cf0e20d175a7cbe283a54816852
Signed-off-by: jiayongqiang <jiayongqiang@xiaomi.com>

services/core/java/com/android/server/display/AutomaticBrightnessController.java

@@ -883,7 +883,7 @@ class AutomaticBrightnessController {
             if (mLoggingEnabled) {
                 Slog.d(TAG, "updateAmbientLux: "
                         + ((mFastAmbientLux > mAmbientLux) ? "Brightened" : "Darkened") + ": "
-                        + "mBrighteningLuxThreshold=" + mAmbientBrighteningThreshold + ", "
+                        + "mAmbientBrighteningThreshold=" + mAmbientBrighteningThreshold + ", "
                         + "mAmbientDarkeningThreshold=" + mAmbientDarkeningThreshold + ", "
                         + "mAmbientLightRingBuffer=" + mAmbientLightRingBuffer + ", "
                         + "mAmbientLux=" + mAmbientLux);