Support for new route properties; Add BRITISH_IMPERIAL voice unit

[DzmitryFomchyn]

Added support for:

• StepIntersection#formOfWay,
• StepIntersection#geometries
• StepIntersection#access
• StepIntersection#elevated
• StepIntersection#bridge

Also added a new voice unit value: DirectionsCriteria#BRITISH_IMPERIAL.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.06%. Comparing base (7364adf) to head (5b7f61c).
⚠️ Report is 1 commits behind head on main.

@@             Coverage Diff              @@
##               main    #1611      +/-   ##
============================================
+ Coverage     78.03%   78.06%   +0.03%     
  Complexity     1062     1062              
============================================
  Files           159      159              
  Lines          4479     4486       +7     
  Branches        626      626              
============================================
+ Hits           3495     3502       +7     
  Misses          715      715              
  Partials        269      269              

Files with missing lines	Coverage Δ
.../mapbox/api/directions/v5/models/RouteOptions.java	95.38% <100.00%> (+0.17%)	⬆️
...box/api/directions/v5/models/StepIntersection.java	100.00% <ø> (ø)

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