Add shims for NetworkRequest

The setUids method in NetworkRequest.Builder is updated to take
a set of integer Range instead of a set of UidRange. This causes
the existing cts net tests targeting for stable APIs failed.
Thus, create NetworkRequestShim as a wrapper that can be used in
common code.


Bug: 172183305
Test: m

(cherry picked from commit 6b52ee4c)

Change-Id: If866919ad97450fadc841dc78da1f9a2ebe230f0
Merged-In: I0b79c73e82b6d0040cb3e5a822c40f62c329ce3f