Address argument encoding nits
This PR addresses the nits listed in from the previously closed PR: https://github.com/microsoft/WindowsAppSDK/pull/2805.
Add sample to display format: https://github.com/microsoft/WindowsAppSDK/pull/2805#discussion_r938203444
Can we return empty string in value for arguments? https://github.com/microsoft/WindowsAppSDK/pull/2805#discussion_r938209869
Tokenizing: https://github.com/microsoft/WindowsAppSDK/pull/2805#discussion_r938213694
Removing unnecessary c_strs: https://github.com/microsoft/WindowsAppSDK/pull/2805#discussion_r938219862 https://github.com/microsoft/WindowsAppSDK/pull/2805#discussion_r938241055
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Closing PRs that appear to have been abandoned.