AdPosition Enum un-matched definitions between Android and iOS

[AbrahamArmasCordero]

Describe the bug
Android has more Definitions for the Same Enum than iOS or Android has too many definitions Undefined in iOS does not exist

Android	iOS
UNDEFINED(-1)	HERE IS THE BUG
UNKNOWN(0)	case undefined = 0
ABOVE_THE_FOLD(1)	case aboveTheFold = 1
LOCKED(2)	case locked = 2
BELOW_THE_FOLD(3)	case belowTheFold = 3
HEADER(4)	case header = 4
FOOTER(5)	case footer = 5
SIDEBAR(6)	case sidebar = 6
FULLSCREEN(7)	case fullScreen = 7

also id 0 in android is "Unknown" and in ios is "Undefined"

To Reproduce
Steps to reproduce the behavior:
go to android file where this is defined https://github.com/prebid/prebid-mobile-android/blob/master/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/AdPosition.java#L36

and to iOS file where this is defined https://github.com/prebid/prebid-mobile-ios/blob/master/PrebidMobile/PrebidMobileRendering/AdPosition.swift#L33

Expected behavior
Both should have the same amount of values. Undefined in iOS should be id = -1 and add the Unknown value or if the problem is in android having too many values we should remove the appropiate value since idk if undefined it's just an option to null on the SDK

Using prebid 2.4.0 in both

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.