HMI does not apply Display mode to the main Alert image

[GetmanetsIrina]

Description:
HMI does not apply display mode to the main Alert image

Preconditions:

1. SDL and HMI are started
2. Mobile app is registered and activated

Steps to reproduce:

1. Mobile app requests Alert( "AlertIcon" = { "value" = <image>.png, "imageType" = "DYNAMIC", "isTemplate" = true })
2. Change Display mode

Expected behavior:
HMI applies display mode to the main Alert image

Observed behavior:
HMI does not apply display mode to the main Alert image

Environment:
SDL: https://github.com/smartdevicelink/sdl_core/tree/develop (c9fc559)
HMI: https://github.com/smartdevicelink/sdl_hmi/tree/develop (41c804d)
SPT: SPT: 20210305-Android (1076)

[Ypostolov]

Luxoft is working on this issue.

[Ypostolov]

@jordynmackool PR with fix is ready for Livio review. Thank you.

[ShobhitAd]

Closed via #568