Summary:
Gets flipper to restart when settings are updated.
In theory most settings should not need this, but the current only one does (android home) because the path is set at startup only, and this modifies the input to it.
It would be a bit awkward to modify the path more than once, but doable.
Reviewed By: passy
Differential Revision: D17737582
fbshipit-source-id: d4669dcc7acc95469f15783fc6a5ba6794750234