Fix String comparison as if Java were Dart. (flutter#6781)

This also removes unused imports and sorts imports correctly

shell/platform/android/io/flutter/view/FlutterView.java

@@ -5,25 +5,20 @@
 package io.flutter.view;
 
 import android.app.Activity;
-import android.content.BroadcastReceiver;
 import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.pm.ApplicationInfo;
 import android.content.res.Configuration;
 import android.database.ContentObserver;
-import android.graphics.PixelFormat;
-import android.provider.Settings;
-import android.net.Uri;
-import android.os.Handler;
 import android.graphics.Bitmap;
+import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.graphics.SurfaceTexture;
+import android.net.Uri;
 import android.os.Build;
+import android.os.Handler;
+import android.provider.Settings;
 import android.text.format.DateFormat;
 import android.util.AttributeSet;
 import android.util.Log;
-import android.util.TypedValue;
 import android.view.*;
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityNodeProvider;
@@ -35,10 +30,8 @@
 import io.flutter.plugin.editing.TextInputPlugin;
 import io.flutter.plugin.platform.PlatformPlugin;
 import org.json.JSONException;
-import org.json.JSONObject;
 
 import java.lang.reflect.Method;
-import java.net.URI;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.util.*;
@@ -972,7 +965,7 @@ public void onChange(boolean selfChange) {
         public void onChange(boolean selfChange, Uri uri) {
             String value = Settings.Global.getString(getContext().getContentResolver(),
                     Settings.Global.TRANSITION_ANIMATION_SCALE);
-            if (value == "0") {
+            if (value != null && value.equals("0")) {
                 mAccessibilityFeatureFlags ^= AccessibilityFeature.DISABLE_ANIMATIONS.value;
             } else {
                 mAccessibilityFeatureFlags &= ~AccessibilityFeature.DISABLE_ANIMATIONS.value;