Add support for C/C++ OS flags

Bug: 315894228
Test: manual
Change-Id: Ie23154e5af53b581fa84062110fd3d8ccdb17c11
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index eed248b..46ef663 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -335,6 +335,17 @@
     mode: "exported",
 }
 
+cc_aconfig_library {
+    name: "android.os.flags-aconfig-cc",
+    aconfig_declarations: "android.os.flags-aconfig",
+}
+
+cc_aconfig_library {
+    name: "android.os.flags-aconfig-cc-test",
+    aconfig_declarations: "android.os.flags-aconfig",
+    mode: "test",
+}
+
 // VirtualDeviceManager
 cc_aconfig_library {
     name: "android.companion.virtualdevice.flags-aconfig-cc",