libmemtrack: Use memtrack proxy service am: c3b9ef06d0 am: a8e3a630a2 am: 868c0c07cc am: d6368c670e

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmemtrack/+/1656471

Change-Id: I3542fda727c9a1b4e88d145fe290a65d4c918f8b