telephony-stack util API lib

attach copyable hidden util API classes to create a jar
file containing these, and statically link it from
telephony mainline modules. Need to jarjar those classes
otherwise classloader will load classes with the same
name in boot class path(framework.jar)

TODO: some Util APIs like AsyncResult which returned from
telephony-common library and used by other apps like Settings.
We should decouple Settings from telephony-common first before
we make a copy and rename AsyncResult.

Bug: 137202333
Test: Manual & Build
Change-Id: I81a6948246f1453481962699855560c2f64bb413