Add BitmapFactory.Options.inMutable to load mutable bitmaps.

Change-Id: Iaa222127520f3aa55072d44af12ee3477908b876

graphics/java/android/graphics/BitmapFactory.java

@@ -63,6 +63,14 @@ public class BitmapFactory {
          */
         public Bitmap inBitmap;
 
+        /**
+         * If set, decode methods will always return a mutable Bitmap instead of
+         * an immutable one. This can be used for instance to programmatically apply
+         * effects to a Bitmap loaded through BitmapFactory.
+         */
+        @SuppressWarnings({"UnusedDeclaration"}) // used in native code
+        public boolean inMutable;
+
         /**
          * If set to true, the decoder will return null (no bitmap), but
          * the out... fields will still be set, allowing the caller to query
@@ -523,7 +531,7 @@ public class BitmapFactory {
             }
             bm.setDensity(targetDensity);
         }
-        
+
         return bm;
     }