Don't interpolate image input to quantizer

With `false`, nearest neighbor is used during scaling, with `true`,
bilinear interpolation is used. Bilinear interpolation can introduce
colors that weren't in the original image (ex. overemphasizing red/brown
highlights in a mostly B+W image of the Mandolorian). Better to avoid
that.

Bug: 189931209
Test: Test tons and tons of wallpapers over a couple days.
Change-Id: I425f95793ca593dbbc5008ef59f4baedaea318a6

core/java/android/app/WallpaperColors.java

@@ -176,7 +176,7 @@ public final class WallpaperColors implements Parcelable {
             shouldRecycle = true;
             Size optimalSize = calculateOptimalSize(bitmap.getWidth(), bitmap.getHeight());
             bitmap = Bitmap.createScaledBitmap(bitmap, optimalSize.getWidth(),
-                    optimalSize.getHeight(), true /* filter */);
+                    optimalSize.getHeight(), false /* filter */);
         }
 
         final Palette palette;