PowerManagerService: Fix manual brightness mode.

Change-Id: I10aec64e3f7ae2715475b9797565747295c19a00
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/services/java/com/android/server/PowerManagerService.java b/services/java/com/android/server/PowerManagerService.java
index f75f7195..93b469f 100644
--- a/services/java/com/android/server/PowerManagerService.java
+++ b/services/java/com/android/server/PowerManagerService.java
@@ -1760,7 +1760,8 @@
         try {
             if (mScreenBrightnessOverride >= 0) {
                 return mScreenBrightnessOverride;
-            } else if (mLightSensorBrightness >= 0 && mUseSoftwareAutoBrightness) {
+            } else if (mLightSensorBrightness >= 0 && mUseSoftwareAutoBrightness
+                    && mAutoBrightessEnabled) {
                 return mLightSensorBrightness;
             }
             final int brightness = Settings.System.getInt(mContext.getContentResolver(),