Move UidRange aidl to create a native cpp version

Moved from:
    //frameworks/base/core/java/android/net/
To:
    //system/netd/binder

Since frameworks/base depends on netd but not vice versa, it is cleaner
to keep the internal aidl in the same place as the native implementation
in netd.

Bug: 26694104
Change-Id: If21a72978ad5b93f0eed04c75143b55157c1a014