Clear calling identity before getUserAccounts in
AccountManagerService

Fix accountsDb tests.

Bug: 36860606
Test: manual
Change-Id: Iad86d1bf7edd0f847262562ace9c2d5c9fdff978
(cherry picked from commit 9fc6f574b43c938913fad7a2ed04b5a7c717bd68)
(cherry picked from commit 5c80debe867cff368546b0d8ba0b81d27e88c3d6)
2 files changed