Make vendor_ramdisk partition install recovery partition files

Implementation details
- Set the rootdir and the root directory hash file in the
  FilesystemProvider.
- Create a text file containing the hash of the root directory.
- Introduce include_files_of property in filesystem, which its rootdirs
  are passed as inputs in mkbootfs invocation for building cpio
  filesystems.
- Set the soong generated recovery partition as the include_files_of
  property of the soong generated vendor_ramdisk partition.

Test: Extract vendor ramdisk partition and inspect
Bug: 381104942
Change-Id: I8c00d6258b4e8fe094ee72a479b06ebcf5dffaf3