Add entry point for adaptive brightness settings

Test: adb shell am start -a android.settings.ADAPTIVE_BRIGHTNESS_SETTINGS
Bug: 187332145
Change-Id: Ifd81bfb3b0abc3ea10a062cb49fab20f6ef3fdfc
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 404207d..fdaa7c0 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -322,4 +322,6 @@
      * Activity for AppDashboard.
      */
     public static class AppDashboardActivity extends SettingsActivity {}
+
+    public static class AdaptiveBrightnessActivity extends SettingsActivity { /* empty */ }
 }