Merge "Prevent apps from spamming addAccountExplicitly. See comment here for the discussion on solution https://b.corp.google.com/issues/169762606#comment14" into sc-dev am: 20e186c3d5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15394764

Change-Id: I9105dc74e06769a3a0cda9246a29d586d9dcc02d