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: I6494366a5695daedc3f4f0046da9e130a5363f5f
Merged-In: If212df3a3b7be1de0fb26b8e88b2fcbb8077c253