Start authfs_service during boot on microdroid

Bug: 194717985
Test: see the service starts on boot
Test: MicrodroidHostTestCases
Change-Id: Ia91cf6d8316bfd95ba3a0ea1fb45c64422c2f85f
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index a0215c3..4926e2c 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -111,6 +111,7 @@
             deps: [
                 "apkdmverity",
                 "authfs",
+                "authfs_service",
                 "zipfuse",
 
                 // TODO(b/184872979): Needed by authfs. Remove once the Rust API is created.