Mark modules frozen explicitly.

Makes it easier to see which versions are available.

Bug: 188871598
Test: N/A
Change-Id: Iec656df1d0008d95ab50f9bd8806517b95242f00
Merged-In: Ica76a8225fec8dc5267362cbfd43e06e65ad3f1e
diff --git a/radio/aidl/Android.bp b/radio/aidl/Android.bp
index 98eafc1..0088264 100644
--- a/radio/aidl/Android.bp
+++ b/radio/aidl/Android.bp
@@ -12,6 +12,7 @@
     vendor_available: true,
     host_supported: true,
     srcs: ["android/hardware/radio/*.aidl"],
+    frozen: true,
     stability: "vintf",
     backend: {
         cpp: {
@@ -35,6 +36,7 @@
     vendor_available: true,
     host_supported: true,
     srcs: ["android/hardware/radio/config/*.aidl"],
+    frozen: true,
     stability: "vintf",
     imports: ["android.hardware.radio"],
     backend: {