Add a new constant to TimeZoneRulesDataContract

This enables time zone data app code (provided by Google)
to check the manifest (provided by the OEM) uses the right permission
without referencing internal manifest permission Strings directly.

Bug: 64139059
Test: Ran internal xTS tests
Change-Id: I4b1a8608beff3b5218ecf5162cfe8e31027e2007
(cherry picked from commit 8e2a85752b9b45e3294c5e94a6a882329433054f)
diff --git a/api/system-current.txt b/api/system-current.txt
index 41f6353..1d6673e 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -38650,6 +38650,7 @@
 
   public final class TimeZoneRulesDataContract {
     field public static final java.lang.String AUTHORITY = "com.android.timezone";
+    field public static final java.lang.String READER_PERMISSION = "android.permission.UPDATE_TIME_ZONE_RULES";
   }
 
   public static final class TimeZoneRulesDataContract.Operation {
diff --git a/core/java/android/provider/TimeZoneRulesDataContract.java b/core/java/android/provider/TimeZoneRulesDataContract.java
index 33d2588..7a5ae1d 100644
--- a/core/java/android/provider/TimeZoneRulesDataContract.java
+++ b/core/java/android/provider/TimeZoneRulesDataContract.java
@@ -41,6 +41,12 @@
     private static final Uri AUTHORITY_URI = Uri.parse("content://" + AUTHORITY);
 
     /**
+     * The permission that the reader of the ContentProvider must possess.
+     */
+    public static final String READER_PERMISSION =
+            android.Manifest.permission.UPDATE_TIME_ZONE_RULES;
+
+    /**
      * Defines fields exposed through the {@link Operation#CONTENT_URI} for describing a time zone
      * distro operation.
      */