This commit also starts the adoption of ErrorOr<T> and the String class
in ImageViewer. However, there is still a few more changes that could
be made.
Since the actions of using LibFSAC and using String in more places are
tightly coupled, I decided to put them in one commit.
The user can now navigate to the previous and next image using the
left and right arrow keys respectively. These shortcuts were
previously not working.
Otherwise, we end up propagating those dependencies into targets that
link against that library, which creates unnecessary link-time
dependencies.
Also included are changes to readd now missing dependencies to tools
that actually need them.
Instead of parsing untrusted and potentially malicious image files in
the ImageViewer GUI process, take advantage of the ImageDecoder service
that we already have on the system to sandbox the decode.
This prevents bugs in our image decoding libraries from being used as
an exploitation vector when viewing files in ImageViewer.
