Fix security vulnerability that creates user with no restrictions when accountOptions are too long.

Bug: 293602970
Test: atest UserManagerTest#testAddUserAccountData_validStringValuesAreSaved_validBundleIsSaved && atest UserManagerTest#testAddUserAccountData_invalidStringValuesAreTruncated_invalidBundleIsDropped
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:7e91582908475af43ff188d9d7e97aea2cdf8ee2)
Merged-In: I23c971f671546ac085060add89485cfac6691ca3
Change-Id: I23c971f671546ac085060add89485cfac6691ca3