Start the home intent when swiping from home to home

This allows us to clean up the home screen properly (close all apps and floating views)

Flag: com.android.launcher3.enable_fallback_overview_in_window
Fixes: 380049465
Fixes: 380049942
Test: TAPL tests
Test: swipe home from home all apps, with and without an open popup menu, with and without a 3P launcher
Change-Id: I3c3c8e832329afc3ffaa1de7cf646be79d84e9a3