Revert "Don't remove starting window for visible app."

This reverts commit 2c596d57.

Reason: Causes starting window leaks

Test: Open 9gag, click home immediately again
Test: go/wm-smoke
Change-Id: I136cbcf66b680c782ab0e039c383e8d189a0b6e3
Fixes: 64154208
Bug: 62443388