libcameraservice: avoid list<const T>

A container of const T uses std::allocator<const T>, which was an
undocumented libc++ extension that has been removed.

See https://github.com/llvm/llvm-project/pull/96319.

Bug: 349681543
Test: m libcameraservice
Change-Id: Ib3ae6b55c4e95cd458e190511a59e8d0459cf16a