Replace SkDrawFilter with PaintFilter.

Skia is removing SkDrawFilter.

Test: refactoring CL. Existing unit tests still pass.
Change-Id: If81c1a2feabf7d377ae1d7bcb3e8cf0f599ad3ce
diff --git a/core/jni/Android.bp b/core/jni/Android.bp
index d4903d8..94ee021 100644
--- a/core/jni/Android.bp
+++ b/core/jni/Android.bp
@@ -126,7 +126,6 @@
         "android/graphics/Camera.cpp",
         "android/graphics/CanvasProperty.cpp",
         "android/graphics/ColorFilter.cpp",
-        "android/graphics/DrawFilter.cpp",
         "android/graphics/FontFamily.cpp",
         "android/graphics/FontUtils.cpp",
         "android/graphics/CreateJavaOutputStreamAdaptor.cpp",
@@ -143,6 +142,7 @@
         "android/graphics/NinePatch.cpp",
         "android/graphics/NinePatchPeeker.cpp",
         "android/graphics/Paint.cpp",
+        "android/graphics/PaintFilter.cpp",
         "android/graphics/Path.cpp",
         "android/graphics/PathMeasure.cpp",
         "android/graphics/PathEffect.cpp",