The other methods expose raw key materials, which is a security flaw. This new API is already being used by GMSCore, via reflection (although falling back to the old methods if it is not available). Would be good to switch it on ASAP. Bug: 74345822 Test: Tested with GMSCore Change-Id: I30d53c9e825888d1122c72d23b7c1c10c6edb1e9