Implement copy_files function

Bug: 193540681
Test: treehugger
Change-Id: Iffc64551e733747a9a29c14b1f674b3a533f44ba
diff --git a/tests/run.rbc b/tests/run.rbc
index da88886..15f6212 100644
--- a/tests/run.rbc
+++ b/tests/run.rbc
@@ -51,7 +51,9 @@
           "part_from:part_to",
           "device_from:device_to",
           "device/google/redfin/audio/audio_platform_info_noextcodec_snd.xml:||VENDOR-PATH-PH||/etc/audio_platform_info_noextcodec_snd.xml",
-          "xyz"
+          "xyz:/etc/xyz",
+          "x.xml:/etc/x.xml",
+          "y.xml:/etc/y.xml",
       ],
       "PRODUCT_HOST_PACKAGES": ["host"],
       "PRODUCT_PACKAGES": [