Fixes few instances where taskbar icon layout was calculated incorrectly
for desktop-fist taskbar, assuming that taskbar gets scaled from
transient taskbar sizes to pinned taskbar (which is not the case).
Adds logic to determine whether taskbar supports transition to transient
taskbar to TaskbarFeatureEvaluator, and uses that values in place of
directly checking whether three button nav is enabled.
Bug: 413494672
Flag: com.android.window.flags.enable_desktop_taskbar_on_freeform_displays
Test: Manual - observe the taskbar layout on a desktop device.
Change-Id: Ie0d44ee5be90024ba405f652bbfd888ed22c393b
Toni Barzic
e686dd3d9d