Make string constants available to outside class for native boot stable
flags

Bug: b/300111812
Change-Id: Ic15c0903311bd5a48b86461384fa1846d260ca42
diff --git a/framework/java/android/provider/DeviceConfig.java b/framework/java/android/provider/DeviceConfig.java
index 997007e..6f169ac 100644
--- a/framework/java/android/provider/DeviceConfig.java
+++ b/framework/java/android/provider/DeviceConfig.java
@@ -72,25 +72,6 @@
 public final class DeviceConfig {
 
     /**
-     * Namespace where flags are staged to be applied on reboot.
-     *
-     * @hide
-     */
-    public static final String NAMESPACE_REBOOT_STAGING = "staged";
-
-    /**
-     * Delimiter for flags in the {@code staged} namespace.
-     *
-     * Flags in this namespace will be applied on reboot. Each flag
-     * in this namespace follows the format {@code namespace*flag},
-     * where {@code namespace} is the namespace the flag will be written
-     * to on reboot, and {@code flag} is the name of the flag.
-     *
-     * @hide
-     */
-    public static final String NAMESPACE_REBOOT_STAGING_DELIMITER = "*";
-
-    /**
      * The name of the service that provides the logic to these APIs
      *
      * @hide