dumpstate: add interface into rc file

Bug: 7748994
Test: Build
Change-Id: I5e86b0e63928f42ea7b247bd0de0719daf80a10d
diff --git a/dumpstate/1.0/default/android.hardware.dumpstate@1.0-service.rc b/dumpstate/1.0/default/android.hardware.dumpstate@1.0-service.rc
index f626f70..dfc7d78 100644
--- a/dumpstate/1.0/default/android.hardware.dumpstate@1.0-service.rc
+++ b/dumpstate/1.0/default/android.hardware.dumpstate@1.0-service.rc
@@ -2,3 +2,4 @@
     class hal
     user system
     group system
+    interface android.hardware.dumpstate@1.0::IDumpstateDevice default