[PM-2737] Adding AutomationIDs for Send page elements

[ifernandezdiaz]

Type of change

• Bug fix
• New feature development
• Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• Build/deploy pipeline (DevOps)
• Other

Objective

This PR adds more AutomationIDs that will help us to improve the quality of our Mobile Automation tests

Code changes

• SendAddEditPage.xaml: Adding IDs for each Send element
• SendGroupingsPage.xaml: Adding IDs for Send lists
• SendGroupingsPageListItem.xaml: Adding a new variable to make AutomationIDs dynamic
• SendsPage.xaml: Adding IDs for label displayed when send list is empty

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[mpbw2]

See inline

[mpbw2]

Looks good, waiting for input on #2580 since it follows the same approach