Extracting handheld task dismiss translation to smaller functions (2/4)

This CL extracts the logic to translate the tasks used when Overview grid is disabled (i.e., for handheld) to 2 smaller functions that will be used for desktop and grid translation in the follow up CL.

Bug: 353948136
Bug: 353948182
Flag: com.android.launcher3.enable_large_desktop_windowing_tile
Test: OverviewDesktopTaskImageTest
Change-Id: Ie25fffaaca4580a8a483003d220b4bf6cdccbc66