Made changes to fix some policy transparency options.

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