chore: skip formatting generated samples (#1456)

Author: eaball35

docker/owlbot/java/bin/format_source.sh

@@ -17,7 +17,7 @@ set -e
 
 # Find all the java files relative to the current directory and format them
 # using google-java-format
-list="$(find . -name '*.java' )"
+list="$(find . -name '*.java' -not -path ".*/samples/snippets/generated/**/*" )"
 tmpfile=$(mktemp)
 
 for file in $list;
@@ -35,4 +35,4 @@ done
 
 cat $tmpfile | xargs java -jar /owlbot/google-java-format.jar --replace
 
-rm $tmpfile
+rm $tmpfile