Add isAvailable check to devOptionsController

- This avoids the null check for PreferenceControllers where isAvailable()
 is not always true

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: Ibed8bc6a2a812355c521620d77fb571c1fd8a649

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

@@ -54,10 +54,29 @@ public abstract class DeveloperOptionsPreferenceController extends
     /**
      * Called when developer options is enabled
      */
-    public abstract void onDeveloperOptionsEnabled();
+    public void onDeveloperOptionsEnabled() {
+        if (isAvailable()) {
+            onDeveloperOptionsSwitchEnabled();
+        }
+    }
 
     /**
      * Called when developer options is disabled
      */
-    public abstract void onDeveloperOptionsDisabled();
+    public void onDeveloperOptionsDisabled() {
+        if (isAvailable()) {
+            onDeveloperOptionsSwitchDisabled();
+        }
+    }
+
+    /**
+     * Called when developer options is enabled and the preference is available
+     */
+    protected abstract void onDeveloperOptionsSwitchEnabled();
+
+    /**
+     * Called when developer options is disabled and the preference is available
+     */
+    protected abstract void onDeveloperOptionsSwitchDisabled();
+
 }