Fix Android 2.2 compatibility

FroYo doesn't support some of Arrays' functions, such as copyOf() and
copyOfRange(). ArraysCompat implements all variants of those methods,
adding FroYo compatibility back

Author: goncalossilva

src/main/java/com/fasterxml/jackson/core/io/CharacterEscapes.java

@@ -1,8 +1,7 @@
 package com.fasterxml.jackson.core.io;
 
-import java.util.Arrays;
-
 import com.fasterxml.jackson.core.SerializableString;
+import com.fasterxml.jackson.core.util.ArraysCompat;
 
 /**
  * Abstract base class that defines interface for customizing character
@@ -67,6 +66,6 @@ public abstract class CharacterEscapes
     public static int[] standardAsciiEscapesForJSON()
     {
         int[] esc = CharTypes.get7BitOutputEscapes();
-        return Arrays.copyOf(esc, esc.length);
+        return ArraysCompat.copyOf(esc, esc.length);
     }
 }

src/main/java/com/fasterxml/jackson/core/json/UTF8StreamJsonParser.java

@@ -1,7 +1,6 @@
 package com.fasterxml.jackson.core.json;
 
 import java.io.*;
-import java.util.Arrays;
 
 import com.fasterxml.jackson.core.*;
 import com.fasterxml.jackson.core.base.ParserBase;
@@ -3129,7 +3128,7 @@ public static int[] growArrayBy(int[] arr, int more)
         if (arr == null) {
             return new int[more];
         }
-        return Arrays.copyOf(arr, arr.length + more);
+        return ArraysCompat.copyOf(arr, arr.length + more);
     }
 
     /*

src/main/java/com/fasterxml/jackson/core/sym/BytesToNameCanonicalizer.java

@@ -3,6 +3,7 @@
 import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicReference;
 
+import com.fasterxml.jackson.core.util.ArraysCompat;
 import com.fasterxml.jackson.core.util.InternCache;
 
 /**
@@ -1012,7 +1013,7 @@ private int findBestBucket()
     private void unshareMain()
     {
         final int[] old = _mainHash;
-        _mainHash = Arrays.copyOf(old, old.length);
+        _mainHash = ArraysCompat.copyOf(old, old.length);
         _mainHashShared = false;
     }
 
@@ -1022,22 +1023,22 @@ private void unshareCollision()
         if (old == null) {
             _collList = new Bucket[INITIAL_COLLISION_LEN];
         } else {
-            _collList = Arrays.copyOf(old, old.length);
+            _collList = ArraysCompat.copyOf(old, old.length);
         }
         _collListShared = false;
     }
 
     private void unshareNames()
     {
         final Name[] old = _mainNames;
-        _mainNames = Arrays.copyOf(old, old.length);
+        _mainNames = ArraysCompat.copyOf(old, old.length);
         _mainNamesShared = false;
     }
 
     private void expandCollision()
     {
         final Bucket[] old = _collList;
-        _collList = Arrays.copyOf(old, old.length * 2);
+        _collList = ArraysCompat.copyOf(old, old.length * 2);
     }
 
     /*

src/main/java/com/fasterxml/jackson/core/sym/CharsToNameCanonicalizer.java

@@ -2,6 +2,7 @@
 
 import java.util.Arrays;
 
+import com.fasterxml.jackson.core.util.ArraysCompat;
 import com.fasterxml.jackson.core.util.InternCache;
 
 /**
@@ -576,9 +577,9 @@ public int calcHash(String key)
     private void copyArrays()
     {
         final String[] oldSyms = _symbols;
-        _symbols = Arrays.copyOf(oldSyms, oldSyms.length);
+        _symbols = ArraysCompat.copyOf(oldSyms, oldSyms.length);
         final Bucket[] oldBuckets = _buckets;
-        _buckets = Arrays.copyOf(oldBuckets, oldBuckets.length);
+        _buckets = ArraysCompat.copyOf(oldBuckets, oldBuckets.length);
     }
 
     /**