DO NOT MERGE DeviceConfig: Add Name space and keys for Display Manager

Bug: 139138964
Change-Id: I077380583f0daf650b17832a6cec4919b41ac155

core/java/android/hardware/display/DisplayManager.java

@@ -820,4 +820,40 @@ public final class DisplayManager {
          */
         void onDisplayChanged(int displayId);
     }
+
+    /**
+     * Interface for accessing keys belonging to {@link
+     * android.provider.DeviceConfig#NAMESPACE_DISPLAY_MANAGER}.
+     * @hide
+     */
+    public interface DeviceConfig {
+
+        /**
+         * Key for accessing the 60 hz only regions.
+         *
+         * @see android.provider.DeviceConfig#NAMESPACE_DISPLAY_MANAGER
+         * @see android.R.array#config_brightnessThresholdsOfPeakRefreshRate
+         * @hide
+         */
+        String KEY_PEAK_REFRESH_RATE_BRIGHTNESS_THRESHOLDS =
+                "peak_refresh_rate_brightness_thresholds";
+
+        /**
+         * Key for accessing the 60 hz only regions.
+         *
+         * @see android.provider.DeviceConfig#NAMESPACE_DISPLAY_MANAGER
+         * @see android.R.array#config_brightnessThresholdsOfPeakRefreshRate
+         * @hide
+         */
+        String KEY_PEAK_REFRESH_RATE_AMBIENT_THRESHOLDS = "peak_refresh_rate_ambient_thresholds";
+
+        /**
+         * Key for default peak refresh rate
+         *
+         * @see android.provider.DeviceConfig#NAMESPACE_DISPLAY_MANAGER
+         * @see android.R.integer#config_defaultPeakRefreshRate
+         * @hide
+         */
+        String KEY_PEAK_REFRESH_RATE_DEFAULT = "peak_refresh_rate_default";
+    }
 }

core/java/android/provider/DeviceConfig.java

@@ -135,6 +135,14 @@ public final class DeviceConfig {
     @SystemApi
     public static final String NAMESPACE_DEX_BOOT = "dex_boot";
 
+    /**
+     * Namespace for display manager related features. The names to access the properties in this
+     * namespace should be defined in {@link android.hardware.display.DisplayManager}.
+     *
+     * @hide
+     */
+    public static final String NAMESPACE_DISPLAY_MANAGER = "display_manager";
+
     /**
      * Namespace for all Game Driver features.
      *