Jarjar frameworks/libs/net in telephony module

Classes in com.android.net.module.util need to be jarjared to the
module's own package. These classes are imported by several modules and
the framework from frameworks/libs/net.

Test: m
Bug: 149403767
Change-Id: Iddd4a1b44dc84b3ed3976b219ef66b2d1a2ca862