Make getCredentialManagerPolicy user handle aware

Bug: 294228721
Test: android.credentials.cts.CtsDevicePolicyTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:0951b28bd94a514eded9503d802228a3591579d6)
Merged-In: I167238e9cccb818643bc491ef56d40e042d80035
Change-Id: I167238e9cccb818643bc491ef56d40e042d80035
3 files changed