Update excluded physical camera IDs for Samsung Galaxy S25 / S25+

On Samsung Galaxy S25 (SM-S931) and S25+ (SM-S936), the rear logical
camera's physical camera IDs are "2", "5", and "6". The quirk previously
mapped them to "2", "3", and "4", leaving physical camera IDs "5" and
"6" unexcluded. This caused CameraX to still expose logical multi-camera
support and attempt to stream from physical camera ID "5", resulting in
HAL metadata count mismatches ("Expected physical Camera metadata count 1
not equal to actual count 0") and ERROR_CAMERA_DEVICE crashes.

This CL updates the SAMSUNG_PROBLEM_MODELS mapping for SM-S931 and SM-S936
to setOf("2", "5", "6").

Bug: 483193836
Test: ExcludePhysicalCameraIdQuirkTest, Camera2CameraControlDeviceTest on sm-s931u1
Change-Id: Id1ca26e899f26270dc65e520e0dfa93c06110cc4