Introduce SDK configuration properties for Creative Factory Timeout

[YuriyVelichkoPI]

Motivation

Provide publishers with an API to change the timeout for requesting and rendering the ad.

Objectives

• Introduce the following properties to customize the SDK behavior:
  • PrebidMobile.creativeFactoryTimeout to customize BANNER_TIMEOUT.
  • PrebidMobile.creativeFactoryTimeoutPreRenderContent to customize INTERSTITIAL_TIMEOUT and VAST_TIMEOUT.
• Introduce customization of these properties via Server Side Configuration using the bidrequest.ext.prebid.passthrough object. See details here and here.
  • cftbanner to customize BANNER_TIMEOUT.
  • cftprerender to customize INTERSTITIAL_TIMEOUT and VAST_TIMEOUT.
• Introduce the following policy of selecting the needed timeout in runtime:
  • If the timeout is present in the passthrough object, use it (Priority I).
  • If the timeout is set via the SDK API PrebidMobile.creativeFactoryTimeout* use it (Priority II).
  • Use the default value (Priority III).
• TBD: need to wait for pub's feedback about the default value. Maybe it makes sense to increase it.
• Add tests