Don't update layout of a view that hasn't been added yet

Fixes: 333180884
Test: atest UdfpsControllerOverlayTest
Test: enroll udfps; rotate device to landscape in an app;
press power button to AOD; observe no crash
Flag: ACONFIG com.android.systemui.udfps_view_performance NEXTFOOD
Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor TRUNKFOOD

Change-Id: Ie27c655df08bf554b2ebd5a24558f84fb4350ad4