Expressive style for Identity Check error dialogs

Changing the alert dialog to android-x should change the styling to be
compliant with the expressive styling as per https://docs.google.com/document/d/1S6iYFjcJIPLyg3kXTs1IGV3z-1-Pta5ZIuDPTlzNY-k/edit?pli=1&resourcekey=0-BvN0bgpiIyt-ev25eOKrGw&tab=t.0#bookmark=id.oegme9eaogmj

Flag: EXEMPT Styling has been guarded by the is_expressive_design_enabled flag
Test: N/A
Bug: 396443114

Change-Id: I4f8e835a08698aa7e667204d982778396fd75837