Mark frozen false to make sure native could reference

android.hardware.biometrics.common-V4-ndk is an unfrozen development version,
and it can't be used if it's explicitly marked as `frozen: true`

Bug: b/305284901
Test: Build pass

Change-Id: Ie3f82da032d5b9d201f094ced2636592cc3f8844

biometrics/common/aidl/Android.bp

@@ -13,7 +13,7 @@ aidl_interface {
     srcs: [
         "android/hardware/biometrics/common/*.aidl",
     ],
-    frozen: true,
+    frozen: false,
     stability: "vintf",
     backend: {
         java: {