[Odometer] Enable Split on Odometer expenses

[garrettmknight]

Tracking: #71841

@Julesssss requested we hide Split for Odometer expenses to unblock Release 1 for Odometer expenses here. Support for Split in Odometer expenses should be added after Release 1 and before Release 2.

It should be pretty straightforward and effectively treated just like a map-based distance expense.

[melvin-bot]

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