Update trusted certificates when the trust store is changed

This CL flushes the trusted cert cache of all active Network Security
Configs and their TrustManagers. Previously CA addition mostly worked
however removed CAs would remain cached in the X509TrustManager causing
the removed CA to still be trusted.

Change-Id: I0f5fd39932f8f8ed3ec5dfd088a82e982b366c43
7 files changed