Move DownloadCommand enum from GeneralPreferencesInfo to DownloadConfig

The correlative download_commands plugin change is:
https://gerrit-review.git.corp.google.com/c/plugins/download-commands/+/381394

Change-Id: I8d87dee5450d5e0bbeedeac7cf0fbf1bd0796445
Bug: Google b/289356590
Release-Notes: skip

java/com/google/gerrit/extensions/client/GeneralPreferencesInfo.java

diff --git a/java/com/google/gerrit/extensions/client/GeneralPreferencesInfo.java b/java/com/google/gerrit/extensions/client/GeneralPreferencesInfo.java
index 020351b..262ae37 100644
--- a/java/com/google/gerrit/extensions/client/GeneralPreferencesInfo.java
+++ b/java/com/google/gerrit/extensions/client/GeneralPreferencesInfo.java
@@ -22,16 +22,6 @@
   /** Default number of items to display per page. */
   public static final int DEFAULT_PAGESIZE = 25;
 
-  /** Preferred method to download a change. */
-  public enum DownloadCommand {
-    PULL,
-    CHECKOUT,
-    CHERRY_PICK,
-    FORMAT_PATCH,
-    BRANCH,
-    RESET,
-  }
-
   public enum DateFormat {
     /** US style dates: Apr 27, Feb 14, 2010 */
     STD("MMM d", "MMM d, yyyy"),

java/com/google/gerrit/server/config/DownloadConfig.java

diff --git a/java/com/google/gerrit/server/config/DownloadConfig.java b/java/com/google/gerrit/server/config/DownloadConfig.java
index 4fdbd4a..28baa1a 100644
--- a/java/com/google/gerrit/server/config/DownloadConfig.java
+++ b/java/com/google/gerrit/server/config/DownloadConfig.java
@@ -19,7 +19,6 @@
 import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.entities.CoreDownloadSchemes;
-import com.google.gerrit.extensions.client.GeneralPreferencesInfo.DownloadCommand;
 import com.google.gerrit.server.change.ArchiveFormatInternal;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
@@ -41,6 +40,16 @@
  */
 @Singleton
 public class DownloadConfig {
+  /** Preferred method to download a change. */
+  public enum DownloadCommand {
+    PULL,
+    CHECKOUT,
+    CHERRY_PICK,
+    FORMAT_PATCH,
+    BRANCH,
+    RESET,
+  }
+
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
 
   private final ImmutableSet<String> downloadSchemes;

plugins/download-commands

diff --git a/plugins/download-commands b/plugins/download-commands
index b90e523..42b608a 160000
--- a/plugins/download-commands
+++ b/plugins/download-commands
@@ -1 +1 @@
-Subproject commit b90e523f589a0e2902823233010163f453243926
+Subproject commit 42b608a64bdb1350656b2ca09643ed4173cd6e73