add non-again tip for archive backup

xwords4/android/app/src/main/java/org/eehouse/android/xw4/DlgDelegate.java

@@ -57,9 +57,10 @@ public class DlgDelegate {
         LAUNCH_THEME_CONFIG,
         SEND_LOGS,
         OPEN_BYOD_DICT,
-        CLEAR_INT_STATS,        // debug only
+        BACKUP_LOADDB,
         BACKUP_OVERWRITE,
         BACKUP_RETRY,
+        CLEAR_INT_STATS,        // debug only
 
         // BoardDelegate
         UNDO_LAST_ACTION,

xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java

@@ -1474,6 +1474,10 @@ public class GamesListDelegate extends ListDelegateBase
             openWithChecks( rowid, summary );
             break;
 
+        case BACKUP_LOADDB:
+            startFileChooser( null );
+            break;
+
         case BACKUP_OVERWRITE:
             ArrayList<SaveWhat> whats = (ArrayList<SaveWhat>)params[0];
             Uri uri = Uri.parse((String)params[1]);
@@ -1920,7 +1924,10 @@ public class GamesListDelegate extends ListDelegateBase
             showDialogFragment( DlgID.BACKUP_LOADSTORE );
             break;
         case R.id.games_menu_loaddb:
-            startFileChooser( null );
+            makeNotAgainBuilder( R.string.not_again_loaddb,
+                                 R.string.key_notagain_loaddb,
+                                 Action.BACKUP_LOADDB )
+                .show();
             break;
 
         case R.id.games_menu_writegit:

xwords4/android/app/src/main/res/values/common_rsrc.xml

@@ -131,6 +131,7 @@
   <string name="key_notagain_arrow">key_notagain_arrow</string>
   <string name="key_notagain_turnchanged">key_notagain_turnchanged</string>
   <string name="key_notagain_newfrom">key_notagain_newfrom</string>
+  <string name="key_notagain_loaddb">key_notagain_loaddb</string>
   <string name="key_notagain_trading">key_notagain_trading</string>
   <string name="key_notagain_hidenewgamebuttons">key_notagain_hidenewgamebuttons</string>
   <string name="key_na_lookup">key_na_lookup</string>

xwords4/android/app/src/main/res/values/tmpstrings.xml

@@ -27,6 +27,10 @@
   <string name="archive_expl_games">All games and other data to
   identify your device.</string>
 
+  <string name="not_again_loaddb">Import settings or game data from a
+  file you previously saved here, or copied from another
+  device.</string>
+
   <string name="backup_bad_file_fmt">The file “%1$s” does not
   contain CrossWords backup data.</string>