gitiles: Use java 17 to build

Change-Id: I84d5ce3d3cd03290da1b311320b60b5efe693c1f

playbooks/gitiles/pre-build.yaml

diff --git a/playbooks/gitiles/pre-build.yaml b/playbooks/gitiles/pre-build.yaml
index 736e282..13fd9ad 100644
--- a/playbooks/gitiles/pre-build.yaml
+++ b/playbooks/gitiles/pre-build.yaml
@@ -2,6 +2,7 @@
   hosts: all
   roles:
     - ensure-bazelisk
-    - ensure-java
+    - role: ensure-java
+      java_version: 17
     - install-build-essential
     - prepare-gerrit-repos