Message	SHA1
Add SystemMessages protos to Connectivity ... This follows the model used for the same protos by the Wifi module in service-wifi. SystemMessageProto is used by NetworkNotificationManager to define IDs for notifications that are also counted in system notification metrics. Bug: 171860710 Test: m Change-Id: Iec674913fad9ad59c04249714a08b5a0d8ab0f84 Remi NGUYEN VAN   commited 2021-03-18 20:04:52 +09:00	e755824378