[Ravenwood] Add support for Android Resource (R) files

- Also make ravenwood-stats-collector.sh collect "keep-all" files too.

Bug: 292141694
Test: atest hoststubgentest tiny-framework-dump-test hoststubgen-invoke-test
Change-Id: Ib0943c7c2f28c2558ddabe804d692b379fc178ed
diff --git a/ravenwood/Android.bp b/ravenwood/Android.bp
index bc608c5..95cbb6b 100644
--- a/ravenwood/Android.bp
+++ b/ravenwood/Android.bp
@@ -221,7 +221,9 @@
     data: [
         ":framework-minus-apex.ravenwood.stats",
         ":framework-minus-apex.ravenwood.apis",
+        ":framework-minus-apex.ravenwood.keep_all",
         ":services.core.ravenwood.stats",
         ":services.core.ravenwood.apis",
+        ":services.core.ravenwood.keep_all",
     ],
 }