Revert^2 "Removing all restored backups except one so we don't have old backups"

This reverts commit 3306fa5325.

Reason for revert: Fixing issue that caused b/328782012

Change-Id: Ib6a1bbfeedf608f5f77ac6be500271e811320f32

src/com/android/launcher3/InvariantDeviceProfile.java

@@ -72,6 +72,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 public class InvariantDeviceProfile {
@@ -577,6 +578,45 @@ public class InvariantDeviceProfile {
         return filteredProfiles;
     }
 
+    /**
+     * Returns the GridOption associated to the given file name or null if the fileName is not
+     * supported.
+     * Ej, launcher.db -> "normal grid", launcher_4_by_4.db -> "practical grid"
+     */
+    public GridOption getGridOptionFromFileName(Context context, String fileName) {
+        return parseAllGridOptions(context).stream()
+                .filter(gridOption -> Objects.equals(gridOption.dbFile, fileName))
+                .findFirst()
+                .orElse(null);
+    }
+
+    /**
+     * Returns the name of the given size on the current device or empty string if the size is not
+     * supported. Ej. 4x4 -> normal, 5x4 -> practical, etc.
+     * (Note: the name of the grid can be different for the same grid size depending of
+     * the values of the InvariantDeviceProfile)
+     *
+     */
+    public String getGridNameFromSize(Context context, Point size) {
+        return parseAllGridOptions(context).stream()
+                .filter(gridOption -> gridOption.numColumns == size.x
+                        && gridOption.numRows == size.y)
+                .map(gridOption -> gridOption.name)
+                .findFirst()
+                .orElse("");
+    }
+
+    /**
+     * Returns the grid option for the given gridName on the current device (Note: the gridOption
+     * be different for the same gridName depending on the values of the InvariantDeviceProfile).
+     */
+    public GridOption getGridOptionFromName(Context context, String gridName) {
+        return parseAllGridOptions(context).stream()
+                .filter(gridOption -> Objects.equals(gridOption.name, gridName))
+                .findFirst()
+                .orElse(null);
+    }
+
     /**
      * @return all the grid options that can be shown on the device
      */