Disable DevelopmentSettingsActivity by default

And if for any reason monkey user is able to enter develop option page,
we show nothing.

And update some test to sdk 26.

Change-Id: I3f985e7fe14bd290db73b8c46dd817591df02015
Fixes: 68707778
Test: robotests
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 78c9c21..6629e82 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -825,7 +825,8 @@
                 || somethingChanged;
 
         final boolean showDev = DevelopmentSettingsEnabler.isDevelopmentSettingsEnabled(this)
-                && !um.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES);
+                && !um.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES)
+                && !Utils.isMonkeyRunning();
 
         somethingChanged = setTileEnabled(new ComponentName(packageName,
                         Settings.DevelopmentSettingsDashboardActivity.class.getName()),