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

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

Change-Id: Ic949e4adfbbbb7e2db63cba1465675c563132188