`&&` and `||` expression will not change the `NONNULL` flag

This code should not pass the compile.
```
export function _start(): void {
  let value: A | null = new A();
  if (value != null) {
    // value = null;  // cause compile error correctly
    true && (value = null); // compile passed, but value is changed to zero now
    let a1 = value.a1;
  }
}
```