Create a generic I/O abstraction #2096
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A lot of operations directly use file descriptor or file descriptor wrappers, that could benefit from an IO abstraction, which can abstract over useful operations: - Buffering of a backing source - Using in-memory data (especially in tests) - Reading from the network - Reading from zip files - Reading the contents of various disk file representations (composite, android-sparse, qcow) - Reading from compressed gzip/bzip2 streams Additionally, it would be nice to expose [`pread`](https://man7.org/linux/man-pages/man2/pread.2.html) and [`pwrite`](https://man7.org/linux/man-pages/man2/pwrite.2.html) as first-class operations to have an alternative to managing the seek cursor. Bug: b/480271687
Bug: b/480271687
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A lot of operations directly use file descriptor or file descriptor wrappers, that could benefit from an IO abstraction, which can abstract over useful operations:
Additionally, it would be nice to expose
preadandpwriteas first-class operations to have an alternative to managing the seek cursor.