Apply apimapper instrument tool on android tests

Apimapper is a tool to instrument android tests to log potentail API calls at the run time.

The real tool is developed internally. We use a placeholder binary in
AOSP before the real tool is ready.

The tool will only take affect when the enviroment var EMMA_API_MAPPER
is set to true.

Test: m cts
Bug: 328699028

Change-Id: Iece53b8afdb9803334b7393527f4fa24e22f71a8