Set default journal size limit

app/src/main/java/eu/faircode/email/DB.java

@@ -127,6 +127,7 @@ public abstract class DB extends RoomDatabase {
     static final String DB_NAME = "fairemail";
     static final int DEFAULT_QUERY_THREADS = 4; // AndroidX default thread count: 4
     static final int DEFAULT_CACHE_SIZE = 10; // percentage of memory class
+    private static final int DB_JOURNAL_SIZE_LIMIT = 1048576; // requery/sqlite-android default
     private static final int DB_CHECKPOINT = 1000; // requery/sqlite-android default
 
     private static final String[] DB_TABLES = new String[]{
@@ -450,6 +451,11 @@ public abstract class DB extends RoomDatabase {
                             cursor.moveToNext(); // required
                         }
 
+                        Log.i("Set PRAGMA journal_size_limit=" + DB_JOURNAL_SIZE_LIMIT);
+                        try (Cursor cursor = db.query("PRAGMA journal_size_limit=" + DB_JOURNAL_SIZE_LIMIT + ";", null)) {
+                            cursor.moveToNext(); // required
+                        }
+
                         // https://www.sqlite.org/pragma.html#pragma_cache_size
                         Integer cache_size = getCacheSizeKb(context);
                         if (cache_size != null) {