Add ravenwood test config template

Modeled after robolectric_test_config_template.xml

Bug: 292141694
Test: m nothing --no-skip-soong-tests
Test: m hoststubgen ravenwood-runtime tradefed atest && atest-dev HostStubGenTest-framework-test
Merged-in: I9ef906074df65c93d9e1a4b4998e6137196075ed
Change-Id: I9ef906074df65c93d9e1a4b4998e6137196075ed