Create quickfix that handles missing typed parameters on Array literals

[jacob314]

We're seeing 1000s if issues due to missing types on Array literals. If an error occurred we know what they should have written. Go ahead and write it as a quick fix.

Example:

Iterable<Type> get _types {
    if (_bindings == null) return  /* severe: StaticTypeError */ [];
    ...
}

should be rewritten as

Iterable<Type> get _types {
    if (_bindings == null) return  <Type>[];
    ...
}

by the quickfix tool

[vsmenon]

Downward inference now handles these cases.