Update codegen to use single channel in sys prop

Update sys prop name from persist.device_config.<namespace>.<flag> to persist.aconfig_flags.aconfig_flags.<namespace>.<flag>

Bug: b/295379636
Change-Id: I78f00daa574dc016902dce4b9b4ec961f973693c
diff --git a/tools/aconfig/src/codegen_rust.rs b/tools/aconfig/src/codegen_rust.rs
index 053cebc..0234eb2 100644
--- a/tools/aconfig/src/codegen_rust.rs
+++ b/tools/aconfig/src/codegen_rust.rs
@@ -103,7 +103,7 @@
     /// query flag disabled_rw
     pub fn disabled_rw(&self) -> bool {
         flags_rust::GetServerConfigurableFlag(
-            "aconfig_test",
+            "aconfig_flags.aconfig_test",
             "com.android.aconfig.test.disabled_rw",
             "false") == "true"
     }
@@ -116,7 +116,7 @@
     /// query flag enabled_rw
     pub fn enabled_rw(&self) -> bool {
         flags_rust::GetServerConfigurableFlag(
-            "aconfig_test",
+            "aconfig_flags.aconfig_test",
             "com.android.aconfig.test.enabled_rw",
             "true") == "true"
     }
@@ -178,7 +178,7 @@
     pub fn disabled_rw(&self) -> bool {
         self.overrides.get("disabled_rw").copied().unwrap_or(
             flags_rust::GetServerConfigurableFlag(
-                "aconfig_test",
+                "aconfig_flags.aconfig_test",
                 "com.android.aconfig.test.disabled_rw",
                 "false") == "true"
         )
@@ -205,7 +205,7 @@
     pub fn enabled_rw(&self) -> bool {
         self.overrides.get("enabled_rw").copied().unwrap_or(
             flags_rust::GetServerConfigurableFlag(
-                "aconfig_test",
+                "aconfig_flags.aconfig_test",
                 "com.android.aconfig.test.enabled_rw",
                 "true") == "true"
         )