authfs: return Merkle tree hidden in the filesystem

fd_server is capable to return a tree "dump" from a file. But for the
normal case where the served file already has fs-verity, we should use
the new AuthFsTestCases ioctl to retrieve the tree and signature.

Test is not included due to some setup difficulty (passed locally).

Bug: 171280402
Test: atest AuthFsTestCases

Change-Id: Ieba685ad065b69edafadce462d112b8fd118686a
3 files changed
tree: 303837be4dfa9dd7887b5535b13b83f2d78ea57f
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. virtmanager/
  7. vm/
  8. .clang-format
  9. PREUPLOAD.cfg