Fix issue where we sent Nan/Infinity matrix params to WM.

This caused a flicker as the surface disappeared for a few frames.

Fixes: 434210339
Flag: com.android.systemui.scene_container
Test: swipe to unlock w/ flexi enabled (timing changes in flexi cause this to be an issue)
Change-Id: I649644fd9560e4d06ca4fb6f9bab10cbd6a4ebd4