Show UID ranges config in dumpsys netd

Dump UID ranges of each network.

$ adb shell dumpsys netd
    ...
    Networks:
      ...
      51 DUMMY dummy0

      52 UNREACHABLE
        prio 1 uids{ 99995 }

      99 LOCAL

      65502 PHYSICAL netde1291
        Required permission: NONE
        prio 1 uids{ 99998 99999 }; prio 2 uids{ 99997 }

      65503 VIRTUAL netd15920
	prio 0 uids{ 99999 }

Bug: 182460808
Test: atest NetdBinderTest & adb shell dumpsys netd
Original-Change: https://android-review.googlesource.com/1733933
Merged-In: Ic167f5b37b97390c3b9f0a87856e90fcb1bafdc5
Change-Id: Ic167f5b37b97390c3b9f0a87856e90fcb1bafdc5