Merge "Prevent apps from spamming addAccountExplicitly. See comment here for...

Merge "Prevent apps from spamming addAccountExplicitly. See comment here for the discussion on solution https://b.corp.google.com/issues/169762606#comment14" into rvc-qpr-dev am: 54c29aa7 am: 5f56fa96

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15640700

Change-Id: I1d4b154ef24f55b12bf83c36699056075150ca16