Add isInputMethodPermittedByAdmin and
isAccessibilityServicePermittedByAdmin APIs in DevicePolicyManager.
And update utility methods in RestrictedLockUtils to use the correct
userId when checking if disabled by admin.
Bug: 26897250
Bug: 26767564
Bug: 26966213
Change-Id: I0b74b3e57904a82f8ce72d856769d35b5e8403e5