Set the container field of aconfig flags

Test: m
Bug: 312769710
Change-Id: I366717c7139886e30360914256ad7710da5095e9
diff --git a/fsverity_init/Android.bp b/fsverity_init/Android.bp
index d9bff3b..5588493 100644
--- a/fsverity_init/Android.bp
+++ b/fsverity_init/Android.bp
@@ -22,12 +22,17 @@
         "libkeyutils",
         "liblog",
     ],
-    cflags: ["-Werror", "-Wall", "-Wextra"],
+    cflags: [
+        "-Werror",
+        "-Wall",
+        "-Wextra",
+    ],
 }
 
 aconfig_declarations {
     name: "aconfig_fsverity_init",
     package: "android.security.flag",
+    container: "system",
     srcs: ["flags.aconfig"],
 }
 
diff --git a/fsverity_init/flags.aconfig b/fsverity_init/flags.aconfig
index 20640d7..495c71c 100644
--- a/fsverity_init/flags.aconfig
+++ b/fsverity_init/flags.aconfig
@@ -1,4 +1,5 @@
 package: "android.security.flag"
+container: "system"
 
 flag {
     name: "deprecate_fsverity_init"