chore(python): omit google/__init__.py in coverage (googleapis#36)

Source-Link: googleapis/synthtool@694118b
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:ec49167c606648a063d1222220b48119c912562849a0528f35bfb592a9f72737

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.coveragerc

@@ -18,6 +18,7 @@
 [run]
 branch = True
 omit =
+  google/__init__.py
   db_dtypes/requirements.py
 
 [report]

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:4ee57a76a176ede9087c14330c625a71553cf9c72828b2c0ca12f5338171ba60
+  digest: sha256:ec49167c606648a063d1222220b48119c912562849a0528f35bfb592a9f72737