Allow API for finding out unique device attestation capabilities

Whitelist the new isUniqueDeviceAttestationSupported DevicePolicyManager
method as it is just a helper method for finding out device capabilities,
not something that requires permissions.

Bug: 136494773
Test: atest ManagedProfileTest#testParentProfileApiDisabled
Change-Id: I9a84566109b0cfee5ff09fa0881c06d2aecb8648
1 file changed