ANDROID: Remove miscellaneous kernel support from microdroid

Microdroid doesn't need to support firmware loading, so remove that.
Also, it doesn't need human interaction devices, so remove support for
that as well.

Bug: 432329937
Change-Id: I657a28475234aaf4bb5bd9cef3e0d944b7bc7723
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>