[cxx-interop] Optimize default impls of `CxxRandomAccessCollection`
[cxx-interop] Optimize default impls of `CxxRandomAccessCollection`

roambotics/swift,roambotics/swift,roambotics/swift,apple/swift,roambotics/swift,apple/swift,apple/swift,apple/swift,apple/swift,roambotics/swift,apple/swift,roambotics/swift