Add permission sync message protos.

Bug: 199427116

Test: N/A
Change-Id: I16da4aa282100ba1bd3f897e2311e0cb11abf7ff
diff --git a/services/companion/Android.bp b/services/companion/Android.bp
index 4ae9365..e3926b4 100644
--- a/services/companion/Android.bp
+++ b/services/companion/Android.bp
@@ -9,7 +9,10 @@
 
 filegroup {
     name: "services.companion-sources",
-    srcs: ["java/**/*.java"],
+    srcs: [
+        "java/**/*.java",
+        "java/**/*.proto",
+    ],
     path: "java",
     visibility: ["//frameworks/base/services"],
 }
@@ -17,6 +20,9 @@
 java_library_static {
     name: "services.companion",
     defaults: ["platform_service_defaults"],
+    proto: {
+        type: "stream",
+    },
     srcs: [":services.companion-sources"],
     libs: ["services.core"],
 }