Rollout edit monitor to 10% users

Simplified the logic in whether to enable edit monitor by passing the
rollout percentage directly instead of reading from a env variable as
now we do not rely on any env var to control the rollout precentage.

Test: atest edit_monitor_utils_test
Bug: 365617369
Change-Id: Ia04d5737dafe2c9715a02f84eb5d75ba6119ceb4
diff --git a/tools/edit_monitor/daemon_manager.py b/tools/edit_monitor/daemon_manager.py
index 9a0abb6..2775b58 100644
--- a/tools/edit_monitor/daemon_manager.py
+++ b/tools/edit_monitor/daemon_manager.py
@@ -84,7 +84,7 @@
         "edit_monitor",
         self.user_name,
         "ENABLE_EDIT_MONITOR",
-        "EDIT_MONITOR_ROLLOUT_PERCENTAGE",
+        10,
     ):
       logging.warning("Edit monitor is disabled, exiting...")
       return