[REFACTOR] DynamicPartitionControl: minimize API

- Move UpdatePartitionMetadata in boot_control_android.cc to
  DynamicPartitionControlAndroid::PreparePartitionsForUpdate to
  reflect code ownership better.
- Minimize the API by removing unused functions now that we have
  PreparePartitionsForUpdate
- Fix tests: replace MockDynamicPartitionControl to
  MockDynamicPartitionControlAndroid because it tests
  DynamicPartitionControlAndroid.

Test: unit test
Test: manually apply full OTA
Change-Id: I2959270bd89c4f8ddaa45cf45ba93acdec850f67

1 files changed, 33 insertions, 0 deletions

diff --git a/dynamic_partition_utils.h b/dynamic_partition_utils.h
new file mode 100644
index 00000000..09fce00c
--- /dev/null
+++ b/dynamic_partition_utils.h
@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2019 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.
+//
+
+#ifndef UPDATE_ENGINE_DYNAMIC_PARTITION_UTILS_H_
+#define UPDATE_ENGINE_DYNAMIC_PARTITION_UTILS_H_
+
+#include <string>
+
+#include <liblp/builder.h>
+
+namespace chromeos_update_engine {
+
+// Delete all groups (and their partitions) in |builder| that have names
+// ending with |suffix|.
+void DeleteGroupsWithSuffix(android::fs_mgr::MetadataBuilder* builder,
+                            const std::string& suffix);
+
+}  // namespace chromeos_update_engine
+
+#endif  // UPDATE_ENGINE_DYNAMIC_PARTITION_UTILS_H_