Added fail-safe

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

@@ -401,6 +401,7 @@ public abstract class DB extends RoomDatabase {
                                 Log.i("Get PRAGMA " + pragma + "=" + (cursor.moveToNext() ? cursor.getString(0) : "?"));
                             }
 
+                        try {
                             ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
                             int class_mb = am.getMemoryClass();
                             int cache_size = class_mb * 1024 * 100 / DB_CACHE_PERCENTAGE;
@@ -414,6 +415,9 @@ public abstract class DB extends RoomDatabase {
                             try (Cursor cursor = db.query("PRAGMA cache_size;")) {
                                 Log.i("Get PRAGMA cache_size=" + (cursor.moveToNext() ? cursor.getInt(0) : "?"));
                             }
+                        } catch (Throwable ex) {
+                            Log.e(ex);
+                        }
 
                         Log.i("Set PRAGMA cache_spill=0");
                         try (Cursor cursor = db.query("PRAGMA cache_spill=0;", null)) {