device: add secure_lock_screen feature
Add android.software.secure_lock_screen feature
This fixes the following cts tests: Module: CtsKeystoreTestCases Tests: - android.keystore.cts.CipherTest#testCanCreateAuthBoundKeyWhenScreenLocked - android.keystore.cts.CipherTest#testKeyguardLockAndUnlock
Signed-off-by: Safae Ouajih souajih@baylibre.com