[dice][refactor] Arrange sample_inputs library and tests in one place

This cl arranges the source code of sample_inputs and its integration
test diced_open_dice_cbor_test in one place.

Bug: 268322533
Test: m microdroid_manager
Test: atest libdiced_sample_inputs.integration_test
Change-Id: I33831b20d719ab43d96b3affb8f478db42ca2739
diff --git a/diced/sample_inputs/src/lib.rs b/diced/sample_inputs/src/lib.rs
new file mode 100644
index 0000000..ebbfd29
--- /dev/null
+++ b/diced/sample_inputs/src/lib.rs
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//! Provides a set of sample inputs for a DICE chain and CDI values derived
+//! from it.
+
+mod sample_inputs;
+
+pub use sample_inputs::make_sample_bcc_and_cdis;