Merge "Fix a11y for tappable BiometricPrompt empty space" into rvc-dev

        android:id="@+id/background"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:accessibilityLiveRegion="polite"

        android:background="@color/biometric_dialog_dim_color"

        android:contentDescription="@string/biometric_dialog_empty_space_description"/>