[Mapbox Java] changelog for v7.4.0 (mapbox#1609)

Co-authored-by: root <root@ca093e7631a4>

[Mapbox Java] changelog for v7.3.2 (mapbox#1606)

Co-authored-by: root <root@dc97fb436b2c>

[Mapbox Java] changelog for v7.3.1 (mapbox#1601)

Co-authored-by: root <root@ceb076bc9f86>

[Mapbox Java] changelog for v7.3.0 (mapbox#1597)

Co-authored-by: root <root@654051bab5e8>

PaymentMethods.etc2 (mapbox#1589)

Optimize Memory Usage by Interning Frequently Occurring Strings in JS…

…ON (mapbox#1585)

* Intern IntersectionLanes's indication strings to save memory.

* Optimize StepManeuver json parsing

Geocoding V6 Support (mapbox#1577)

* V6 preview

* V6 full support

* Code review

* Adding V6FeatureType.SECONDARY_ADDRESS & address_line1

* Adding name_preferred, full_address and bbox to V6Properties

* Adding coordinates.routable_points

* Adding V6ContextAddress

* Updating java docs

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Co-authored-by: Dzmitry Fomchyn <dimafomchin@gmail.com>
Co-authored-by: dzmitryfomchyn <Dzmitry.Fomchyn@mapbox.com>

[Mapbox Java] changelog for v6.15.0 (mapbox#1572)

Co-authored-by: root <root@99d26852d82b>

[Mapbox Java] changelog for v6.14.0 (mapbox#1569)

Co-authored-by: root <root@f80961480444>

[Mapbox Java] changelog for v6.13.0 (mapbox#1562)

Co-authored-by: root <root@6ab76dba9a4c>