fix crash loop when upgrading from v0.101

For upgrades from DB version earlier than 63, the whole table is recreated
by resetTransient() in migrateToPackageTable() so the upgrade method for
the OBB tables only needs to run when the database is at exactly version 63

This was mistakenly added to cd9582c9902dd4ac9218acfd69872f3eebcd3d93 when
it was rebased on !375.

app/src/main/java/org/fdroid/fdroid/data/DBHelper.java

@@ -361,8 +361,14 @@ class DBHelper extends SQLiteOpenHelper {
         addObbFiles(db, oldVersion);
     }
 
+    /**
+     * For upgrades from earlier than 63, this is created in
+     * {@link #resetTransient(SQLiteDatabase)} in
+     * {@link #migrateToPackageTable(SQLiteDatabase, int)}, so it only needs
+     * to run when the database is at version 63.
+     */
     private void addObbFiles(SQLiteDatabase db, int oldVersion) {
-        if (oldVersion >= 64) {
+        if (oldVersion != 63) {
             return;
         }
         Utils.debugLog(TAG, "Adding " + ApkTable.Cols.OBB_MAIN_FILE
@@ -499,10 +505,6 @@ class DBHelper extends SQLiteOpenHelper {
                         + ApkTable.Cols.MIN_SDK_VERSION + " integer, "
                         + ApkTable.Cols.TARGET_SDK_VERSION + " integer, "
                         + ApkTable.Cols.MAX_SDK_VERSION + " integer, "
-                        + ApkTable.Cols.OBB_MAIN_FILE + " string, "
-                        + ApkTable.Cols.OBB_MAIN_FILE_SHA256 + " string, "
-                        + ApkTable.Cols.OBB_PATCH_FILE + " string, "
-                        + ApkTable.Cols.OBB_PATCH_FILE_SHA256 + " string, "
                         + ApkTable.Cols.PERMISSIONS + " string, "
                         + ApkTable.Cols.FEATURES + " string, "
                         + ApkTable.Cols.NATIVE_CODE + " string, "
@@ -528,10 +530,6 @@ class DBHelper extends SQLiteOpenHelper {
                         ApkTable.Cols.MIN_SDK_VERSION,
                         ApkTable.Cols.TARGET_SDK_VERSION,
                         ApkTable.Cols.MAX_SDK_VERSION,
-                        ApkTable.Cols.OBB_MAIN_FILE,
-                        ApkTable.Cols.OBB_MAIN_FILE_SHA256,
-                        ApkTable.Cols.OBB_PATCH_FILE,
-                        ApkTable.Cols.OBB_PATCH_FILE_SHA256,
                         ApkTable.Cols.PERMISSIONS,
                         ApkTable.Cols.FEATURES,
                         ApkTable.Cols.NATIVE_CODE,