Call WindowManagerInternal#waitForAllWindowsDrawn for secondary displays

When a secondary display is turning on,
WindowManagerInternal#waitForAllWindowsDrawn does not get called
properly. This CL updates PhoneWindowManager to call this method so that
secondary displays may power on correctly.

Fixes: 184780671
Test: power on primary display while using Android Auto
Change-Id: I649c796933d81ff80afec26f66eecb4805f3d69c