fix: compare field initializer values across constructors

[oriori1703]

JADX can incorrectly replace different constructor assignments with one shared field initializer, changing the behavior of the decompiled code. In this example, the second constructor should set value to 2, but the broken output gives both constructors 1.

Broken output

class Example {
    final int value = 1;

    Example() {}

    Example(int ignored) {}
}

Fixed output

class Example {
    final int value;

    Example() {
        this.value = 1;
    }

    Example(int ignored) {
        this.value = 2;
    }
}

Testing

Field-initialization tests, Checkstyle, and Spotless pass. The full clean build dist was not run.