RDART-1006: Reference equality implies equality

[nielsenko]

Fixes: #1632

[nielsenko]

One thing to be aware of still is that:

final x = [RealmValue.from(1)];
final xrv = RealmValue.from(x);
expect(xrv, xrv); // ref eq
expect(xrv, RealmValue.from(x)); // value ref eq

final y = [1];
final yrv = RealmValue.from(y);
expect(yrv, yrv); // ref eq
expect(yrv, isNot(RealmValue(y))); // value not ref eq, as internal list is mapped to RealmValue's

[coveralls-official]

Pull Request Test Coverage Report for Build 8718741421

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.346%

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Totals
Change from base Build 8718715498:	0.0%
Covered Lines:	5856
Relevant Lines:	6782

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💛 - Coveralls