added suppress deprecation linter and visiblefortesting tag

Author: jesswrd

shell/platform/android/io/flutter/Build.java

@@ -4,11 +4,13 @@
 
 package io.flutter;
 
+import androidx.annotation.VisibleForTesting;
+
 /** A replacement of utilities from android.os.Build. */
 public class Build {
   /** For use in place of the Android Build.VERSION_CODES class. */
   public static class API_LEVELS {
-    public static final int FLUTTER_MIN = 21;
+    @VisibleForTesting public static final int FLUTTER_MIN = 21;
     public static final int API_21 = 21;
     public static final int API_22 = 22;
     public static final int API_23 = 23;

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

@@ -610,6 +610,7 @@ public enum ZeroSides {
    *
    * @return some ZeroSides enum
    */
+  @SuppressLint("deprecated")
   @androidx.annotation.DeprecatedSinceApi(api = API_LEVELS.API_30)
   @VisibleForTesting
   public ZeroSides calculateShouldZeroSides() {