authfs: add unit tests for ChunkedFileReader

Now that Rust tests can run with data:
 - Add unit tests for ChunkedFileReader
 - Update other tests to use test files, instead of include_bytes!
 - Remove `impl ReadOnlyDataByChunk for &[u8]` since it's no longer use.

Test: atest authfs_device_test_src_lib
Bug: 178874539
Change-Id: Idee833a2fd86aa9d8b8550b574686ea56158f93f
4 files changed
tree: bcc9a0ebf5a84dcf1dd2d215dbb88a42ee613457
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. .clang-format
  7. PREUPLOAD.cfg