Fix storaged memory leak

storaged try to load user's proto even if it has been loaded before

https://partnerissuetracker.corp.google.com/u/2/issues/118719575



Change-Id: Ia7575cdc60e82b028c6db9a29ae80e31e02268b1
(cherry picked from commit 857a63eb)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 170732441
Test: compile