Add skeleton for resource shrinker integration

This adds a new interface for tracing through the resource model.

In the old gradle setup this is implemented just as a no-op, with copy through.
For the new gradle setup this is implemnted with a single call to the resource shrinker to ensure access, and then just copy through.

Bug: b/287398085
Change-Id: I9e103f1149c9e209ab7dbad607a5047aac83cfbd
diff --git a/d8_r8/test_modules/tests_java_8/settings.gradle.kts b/d8_r8/test_modules/tests_java_8/settings.gradle.kts
index 4935653..00c70f1 100644
--- a/d8_r8/test_modules/tests_java_8/settings.gradle.kts
+++ b/d8_r8/test_modules/tests_java_8/settings.gradle.kts
@@ -6,6 +6,7 @@
 
 val root = rootProject.projectDir.parentFile.parentFile
 includeBuild(root.resolve("keepanno"))
+includeBuild(root.resolve("resourceshrinker"))
 
 // We need to include src/main as a composite-build otherwise our test-modules
 // will compete with the test to compile the source files.