Mark modules frozen explicitly.

Makes it easier to see which versions are available.

Bug: 188871598
Test: N/A
Change-Id: Ica76a8225fec8dc5267362cbfd43e06e65ad3f1e
diff --git a/camera/common/aidl/Android.bp b/camera/common/aidl/Android.bp
index d21ae58..fa74392 100644
--- a/camera/common/aidl/Android.bp
+++ b/camera/common/aidl/Android.bp
@@ -11,6 +11,7 @@
     name: "android.hardware.camera.common",
     vendor_available: true,
     srcs: ["android/hardware/camera/common/*.aidl"],
+    frozen: true,
     stability: "vintf",
     backend: {
         cpp: {