omni: switch branch refs to android-14.0

Change-Id: Icf23a1368e21dcdb29df0bc3a2010323332723fd
diff --git a/build/tools/roomservice.py b/build/tools/roomservice.py
index f069e76..61e3a11 100755
--- a/build/tools/roomservice.py
+++ b/build/tools/roomservice.py
@@ -38,7 +38,7 @@
 # set this to the default remote to use in repo
 default_rem = "omnirom2"
 # set this to the default revision to use (branch/tag name)
-default_rev = "android-13.0"
+default_rev = "android-14.0"
 # set this to the remote that you use for projects from your team repos
 # example fetch="https://github.com/omnirom"
 default_team_rem = "omnirom2"