protected android.provider.Telephony.SECRET_CODE

1. This intent is only sent from telephony framework, thus mark it as
protected broadcast.
2. remove deprecated API sendDialerCode

Bug: 35767402
Test: run cts -m CtsPermissionTestCases -t
android.permission.cts.TelephonyManagerPermissionTest

Change-Id: Ibd82b35d78c796ed6d2c3e33f931f3fe9f0f1f8a
2 files changed