add network related API into ActivityTrigger

This API is used for specific apps, which have
high requirement for the quality of mobile network.
AMS is the right client to trigger this feature.
Hooks are added in several senarios in AMS:
1.app start.
2.app die.
3.device goes to sleep mode.
4.device is in Keyguard mode.
5.WIFI/MOBILE switch.
6.Aipplane mode switch.

Change-Id: I322737edc4d343c36445c91d60d9fb2abe127e75
CRs-Fixed: 1036319