SF: parseDisplayIdentificationData to tests both ID schemes

Split parseDisplayIdentificationData into two separate unit tests:
  1. parseDisplayIdentificationDataWithPortBasedIds to test port-based
     display IDs.
  2. parseDisplayIdentificationDataWithStableEdidIds to test the new
     stable EDID-based display IDs.

Bug: 440590608
Flag: EXEMPT TEST_ONLY
Test: pass DisplayIdentificationTest
Change-Id: Iaf301707b13d6bada8cef26cc30061763409d2dd