Background:
* -f = Allows mapping files in the format `-f file:backing_file`. This
can be used for mapping secure storage files like `0` and `persist/0`
to block devices. Storageproxyd will handle creating the appropriate
symlinks in the root datapath
* -m = Allows specifying the the max size constraint for file backed storages.
The constraint is chosen by giving a file, this allows for passing a
block device for which a max file size can be queried. File based
storages will be constrained to that size as well.
Bug: 324989972
Test: File sizes are restricted as specified, and mappings are created
Change-Id: I8ff550afafbd372288daa9e27c4db3451948b25d
Signed-off-by: Donnie Pollitz <donpollitz@google.com>
636234bebf