Add a placeholder for BIOMETRIC_ERROR_CONTENT_VIEW_MORE_OPTIONS_BUTTON

This is for the previously added content view with more options button, a placeholder in BiometricConstants in the framework should be added even though it is not used, so that AndroidX constants could keep consistent with the framework. Simlar to BIOMETRIC_ERROR_NEGATIVE_BUTTON.

Bug: 328843028
Test: atest AuthSessionTest
Flag: EXEMPT bug fix - add an internal error code

Change-Id: Ica24caf61d02dfdd111c741795c43ed936508c92