repair notification & appaction navigation in iOS

[edgiardina]

when you open a notification sometimes shell doesn't take you where you want to go.

[edgiardina]

This seems to be related to when you have a child navigation item like
//rankings/player-search.
Navigation to a top level shell page seems to work fine
A second issue also appears, where if you are on
//rankings/player-details?playerId=1 and you get a request to deeplink to
//rankings/player-details?playerId=2 you won't load the second page because the shell nav thinks you're already on that page

[edgiardina]

Related: dotnet/maui#16442

[edgiardina]

Related: dotnet/maui#16568