Added clang-format and java formatting for ExtServices

Test: Builds
Change-Id: If80fcfb668ac7542b73d1b3b9c2fe23e70bd2248
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..ddb11bf
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,11 @@
+[Builtin Hooks]
+clang_format = true
+
+[Builtin Hooks Options]
+# Only turn on clang-format check for the following subfolders.
+clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp
+               jni/
+               native/
+
+[Hook Scripts]
+checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
\ No newline at end of file