Enable Checkstyle for frameworks/opt/telephony

- users have the option to skip checkstyle check

Bug: 32954735
Test: tested locally by uploading a file that had a checkstyle issue.
Change-Id: I8c7be690e379a68cea20d0807fdb22fa2f2d807c
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..4c347d2
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,2 @@
+[Hook Scripts]
+checkstyle_hook = ${REPO_ROOT}/development/tools/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}