SF: Reject hotplug if display modes failed to load

Do not abort if the repeated attempts to query the display modes and
active mode fail, which could happen if HWC disconnected the display
but the disconnect event has not yet been processed.

Bug: 241286153
Bug: 235488695
Test: HotplugTest.rejectsHotplugIfFailedToLoadDisplayModes
Change-Id: I0997a502dc88a28f993f51a8ef23aeac17694b90