Support restriction:forward:conditional

[alyonapinchuk]

Many roads in the world are like this pic.

line 1: all Vehicles can be going forward
line 2: bus and taxi can be going backward
Line 2: vehicles can u-turn all time
Line 2: all Vehicles can backward from 23:00 to 6:00
line 1: all vehicles can U-TURN from 23:00 to 6:00

and in osm, we use these tags for all roads like this.

bus:backward=designated
lanes:forward=2
lanes=3
restriction:forward:conditional=no_u_turn @ (06:00-23:00)
taxi:backward=designated
vehicle:backward:conditional=yes @ (23:00-06:00)
vehicle:backward=no

I hope OsmAnd can support all these tags.

[vshcherb]

We are going support conditional restrictions and this issue is merged into
#1329
#6271