SUW: (Not-really-)Spring Cleanup

* Remove unused imports
* Fix a few line length issues
* Convert a few anonymous classes to lambda expressions
* Convert a few global vars to locals
* Remove unused methods
* Add a small local method in MobileDataActivity to shorten repeated calls

Change-Id: Ia10be8b8c98ef3956949f913ddb6bddc185cf1a5

src/org/lineageos/setupwizard/SetupWizardApp.java

@@ -26,7 +26,6 @@ import android.util.Log;
 import org.lineageos.setupwizard.util.NetworkMonitor;
 import org.lineageos.setupwizard.util.PhoneMonitor;
 import org.lineageos.setupwizard.util.SetupWizardUtils;
-import org.lineageos.setupwizard.wizardmanager.WizardManager;
 
 public class SetupWizardApp extends Application {
 
@@ -80,12 +79,7 @@ public class SetupWizardApp extends Application {
     private final Bundle mSettingsBundle = new Bundle();
     private final Handler mHandler = new Handler();
 
-    private final Runnable mRadioTimeoutRunnable = new Runnable() {
-        @Override
-        public void run() {
-            mIsRadioReady = true;
-        }
-    };
+    private final Runnable mRadioTimeoutRunnable = () ->  mIsRadioReady = true;
 
     @Override
     public void onCreate() {