Fix BiometricDialog onConfigChange crash

BiometricDialog was crashing during orientation changes due to
incorrectly tracked window state.

Test: With BiometricPromptDemo, orientation changes work again
Test: Unplub USB, enable battery saver, start authentication,
      plug in USB. Changes from dark theme to light theme
Test: BiometricDialog width is correct before/after rotation

Change-Id: Id6021f3defded1bfd71c008b4ebdab2e13f9f515
Fixes: 118835751