Camera ITS: Fix its test_multi_camera_alignment failed

When logical camera has less than two RAW capable physical cameras,
wrong slice operation for list data is occured.
Two elements are expected to be copied,
but only one element is actually copied.
In subsequent processing,
out of range reference occurs for physical_ids[].

Bug: 142523657
Test: Execution

Change-Id: I468c47cc28a2e22799130294034839a8b811cffc
1 file changed