[automerger skipped] Prevent apps from spamming addAccountExplicitly. am:...

[automerger skipped] Prevent apps from spamming addAccountExplicitly. am: 551d70e1 am: 662fcc58 -s ours am: 9290f7b3 -s ours am: ef4197a1 -s ours am: 4b8d2c67 -s ours am: 4bbb0afe -s ours

am skip reason: skipped by user aseemk

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15624525

Change-Id: Ic6c30d3f3a67d681d84bbc4a6b5c1ca6acfa7a4f