chore: convert to owlbot (#743)

owlbot.py

diff --git a/owlbot.py b/owlbot.py
new file mode 100644
index 0000000..c245dee
--- /dev/null
+++ b/owlbot.py
@@ -0,0 +1,38 @@
+# Copyright 2021 Google LLC
+#
+# 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
+#
+#     https://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.
+
+import synthtool as s
+from synthtool.languages import java
+
+
+for library in s.get_staging_dirs():
+    # put any special-case replacements here
+    s.move(library)
+
+s.remove_staging_dirs()
+java.common_templates(
+    excludes=[
+        "LICENSE",
+        "README.md",
+        "java.header",
+        "checkstyle.xml",
+        "renovate.json",
+        "license-checks.xml",
+        "samples/**",
+        ".github/workflows/approve-readme.yaml",
+        ".github/workflows/samples.yaml",
+        ".kokoro/nightly/integration.cfg",
+        ".kokoro/presubmit/integration.cfg",
+    ]
+)