Add Window Manager Server Instrumentation test

The Window Manager and Activity Manager server tests are moving from
FrameworksServicesTests to WmTests to isolate those so that they only
run when needed and avoid cross test stability issues.

Bug: 113800711
Test: make -j48 continuous_instrumentation_tests dist
Change-Id: I14c676bcae04eab1c9b67e62d1f01e6ca41f2c1e