Add ravenwood minimum test

This helps examine what ravenwood test jars contain.

Currently it's rather large:

$ ll $ANDROID_HOST_OUT/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar
-rw-r--r-- 1 omakoto primarygroup 2705929 Dec  1 11:06 /android/main-without-vendor/out/host/linux-x86/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar

$ jar tvf $ANDROID_HOST_OUT/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar | wc -l
2000

Seems like we're pulling in even kotlin runtime classes from the
androidx dependencies?

We can move them to ravenwood-runtime.

Bug: 292141694
Test: atest --host RavenwoodMinimumTest

Change-Id: Ifb939c9914ef7fa6610adb697d05369d16c76d29