DO NOT MERGE: KeyChainTest for device that don't have Secure Lock Screen

Device that don't have secure lock screen cannot pass this test
because this test request to set a lock screen PIN or password
when install credentials but such device don't support PIN nor password.
So, this test should only be run on device that have secure lock screen.

Change-Id: Idec4fa1ece3abc6f5a01452fab8b6b2a69c710e9
Signed-off-by: Ryohei Takeuchi <takeuchi.ryohei@sts-tottori.com>