Add a new developer options screen for shared data.

Add a new Storage section in the developer options menu which has a
new Shared Data preference. This preference screen shows all shared data
blobs on the device. There is also a new screen for each data blob which
shows all of the packages which currently have a leases on it. This
screen also has a button to delete the shared data blob.

Bug: 150626561
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SharedDataPreferenceControllerTest
Test: manual (visual)
Change-Id: Id84a33dc7eeac493b2f81d3996ad24ee70557a07

src/com/android/settings/development/storage/BlobInfoViewHolder.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+package com.android.settings.development.storage;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.TextView;
+
+import com.android.settings.R;
+
+/**
+ * View holder for {@link BlobInfoListView}.
+ */
+class BlobInfoViewHolder {
+    View rootView;
+    TextView blobLabel;
+    TextView blobId;
+    TextView blobExpiry;
+
+    static BlobInfoViewHolder createOrRecycle(LayoutInflater inflater, View convertView) {
+        if (convertView != null) {
+            return (BlobInfoViewHolder) convertView.getTag();
+        }
+        convertView = inflater.inflate(R.layout.blob_list_item_view, null);
+
+        final BlobInfoViewHolder holder = new BlobInfoViewHolder();
+        holder.rootView = convertView;
+        holder.blobLabel = convertView.findViewById(R.id.blob_label);
+        holder.blobId = convertView.findViewById(R.id.blob_id);
+        holder.blobExpiry = convertView.findViewById(R.id.blob_expiry);
+        convertView.setTag(holder);
+        return holder;
+    }
+}