Prevent apps from spamming addAccountExplicitly.

See comment here for the discussion on solution
https://b.corp.google.com/issues/169762606#comment14

Change-Id: If212df3a3b7be1de0fb26b8e88b2fcbb8077c253

Bug: 169762606
(cherry picked from commit 11053c17)

Change-Id: Ifdfa5e35efb87095557805484306fc138d67eb52
Merged-In: If212df3a3b7be1de0fb26b8e88b2fcbb8077c253