Add ability to animate navbar for long press.

Demo: https://drive.google.com/file/d/1MmRZ8xKpJu_lG_6fAPg9kd2TlV0oJZjH/view?usp=drive_link&resourcekey=0-kI37qyrFWgfDSGLNnAk4xg

General control flow for animateNavBarLongPress:
Launcher --systemUiProxy-> OverviewProxyService --notifyAnimateNavBarLongPress-> NavigationBar
   --getHomeHandle-> ButtonDispatcher --animateLongPress-> NavigationHandle

Bug: 306400785
Test: Manual on device
Flag: LEGACY ANIMATE_LPNH TEAMFOOD
Change-Id: I7e767cae50081123db9fc6c384b55ebbeace1d99