Check to show IME after committing finish drawing windows

This CL also sets the IME window to the provider before updating the
target, so that we don't get null control or null control target.

Fix: 149457480
Fix: 149462652
Test: Reboot device and click on an EditText
Test: atest NavigationBarColorTest
Change-Id: Iae0c4cf976e2c6816887420d5980ea39d17e4934