[dice] Move dice bindgens next to their safe wrapper library

This cl moves the open-dice cbor and bcc bindgens and their tests
next to their safe wrapper library so that we can limit their
visibility only to :__subpackges__ to align with the rust bindgen
recommendation[1].

[1] https://source.android.com/docs/setup/build/rust/building-rust-modules/source-code-generators/bindgen-modules#visibility-and-linkage
Bug: 267575445
Test: m pvmfw_img microdroid_manager

Change-Id: I04e6861600c8d40120041e7eaec7fb468a4dc00a
diff --git a/diced/TEST_MAPPING b/diced/TEST_MAPPING
index be1c5e5..8629b07 100644
--- a/diced/TEST_MAPPING
+++ b/diced/TEST_MAPPING
@@ -7,6 +7,12 @@
       "name": "libdiced_open_dice_nostd.integration_test"
     },
     {
+      "name": "libopen_dice_cbor_bindgen_test"
+    },
+    {
+      "name": "libopen_dice_bcc_bindgen_test"
+    },
+    {
       "name": "diced_utils_test"
     },
     {