Attribute wakelocks held by RIL to clients

Telephony services are requested by applications and other
services in the Android framework. Attribute the wakelock
held time to the applications and services that requested
the particular operation.

If multiple clients are requesting for a service at the same
time, divide the time equally between all the requests

BUG=31041780
Change-Id: Id5521809d5a4324c1bd9dc229a743033886b35a3