Revert "identity - temp interface change"

This reverts commit d3cedfe83d277511e59feaf5147c27b262ea43cd.

Reason for revert: we have 'frozen bool' support now

Change-Id: Ie7e90b1e7d6501561ea042785d77ab77072e2577
diff --git a/identity/aidl/Android.bp b/identity/aidl/Android.bp
index 9f2e498..f568f7a 100644
--- a/identity/aidl/Android.bp
+++ b/identity/aidl/Android.bp
@@ -18,6 +18,7 @@
         "android.hardware.security.keymint-V3",
     ],
     stability: "vintf",
+    frozen: false,
     backend: {
         java: {
             platform_apis: true,