Update strings in special app access and dev options

- Change all yes/no or on/off strings in special app access to
  Allowed/Not allowed
- Remove some dead code in related files
- Add a toast string in DevelopmentSettingsDisabledActivity to prompt
  user enable dev options before use.
- Add search in SpecialAccessSettings

Change-Id: I8b2535e037a86e76bdbcd3fb6e1cf2e0347bedbf
Fix: 38290299
Fix: 37469224
Test: make RunSettingsRoboTests

src/com/android/settings/development/DevelopmentSettingsDisabledActivity.java

@@ -18,11 +18,15 @@ package com.android.settings.development;
 
 import android.app.Activity;
 import android.os.Bundle;
+import android.widget.Toast;
+
+import com.android.settings.R;
 
 public class DevelopmentSettingsDisabledActivity extends Activity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        Toast.makeText(this, R.string.dev_settings_disabled_warning, Toast.LENGTH_SHORT).show();
         finish();
     }
 }