Add test cases to CtsVerifier: check notifications for CA certs

Two test cases.
- One to check that a notification happens when a cert is installed.
- One to check that after rebooting the device, a notification shows if there is already a certificate installed.

Bug: 10773862
Change-Id: I9aee2c07f9eb78336539e9ef84bc1337c1086151
9 files changed