Launch the app if it's not running onMovedToFront

This method is used by taskbar to move an app to the front. With the
latest back nav changes, minimized apps can be non-running. With this
change if the apps are not running we launch them instead.

Bug: 369981804
Test: atest DesktopTasksControllerTest
Flag: com.android.window.flags.enable_desktop_windowing_back_navigation
Change-Id: Icb4872eb5ed3ecf10a87e068fb2e14422569768f