Minor cc_cmake_snapshot touch-ups

- Partial support for arm64 hosts (no prebuilts yet)
- Replace incorrect template function use MATCHES with STREQUAL
- Add more ignored system libs
- No need to explicitly add libc++ prebuilt

Bug: 285204695
Test: m binder_sdk
Change-Id: Id6508cc9f9ee6328c95c2821c325629f84eda138