Update runners to ubuntu-24.04 from deprecated ubuntu-20.04 label (#2806)

Co-authored-by: Bill Napier <[email protected]>

Author: google-admin

.github/workflows/build.yml

@@ -44,7 +44,7 @@ concurrency:
 jobs:
   # Build will compile APK, test APK and run tests, lint, etc.
   build:
-    runs-on: ubuntu-22.04-8core
+    runs-on: 'ubuntu-24.04-8core'
     timeout-minutes: 60
     permissions:
       actions: read