Don't log account name on logcat (cherry-pick from master)

Test: manual test
- dumpsys content still shows accounts
- logcat doesn't show account names after "adb shell requestsync"
Bug: 121987496

Change-Id: I853c9b77cbb331eb5138f0f774365f405f321fd2
Merged-In: Ic4b8448d10936c9368b1aab208ae7d8e78c3a1ae