[DirectoryInfo] Add  CopyAllTo, CopyTo, Rename functions。
[FileInfo] Add CopyTo function.
[FileSystem] (refactoring) Adjust the file layouts.

- Adjust the file layouts of FileInfo and DirectoryInfo.
[FileSystem] (refactoring)

- Use const and auto as possible.
- Improve the comments of Path( std::string ).
[Error] Fix: Throw StdExceptionHolder when rethrow a std::exception.

- When copying a std::exceptoin, its "what" string may not be copyed. Therefore we store the string and throw another std::exception derived.
Merge branch 'master' into ndk_r10c
[Test] [Android] Add Concurrent package suites.