constify JNINativeMethod function pointer tables

core/jni/AndroidRuntime.cpp

core/jni/android/graphics/Bitmap.cpp

core/jni/android/graphics/BitmapFactory.cpp

core/jni/android/graphics/BitmapRegionDecoder.cpp

core/jni/android/graphics/Camera.cpp

core/jni/android/graphics/CanvasProperty.cpp

core/jni/android/graphics/ColorFilter.cpp

core/jni/android/graphics/DrawFilter.cpp

core/jni/android/graphics/FontFamily.cpp

core/jni/android/graphics/Interpolator.cpp

core/jni/android/graphics/MaskFilter.cpp

core/jni/android/graphics/Matrix.cpp

core/jni/android/graphics/Movie.cpp

core/jni/android/graphics/NinePatch.cpp

core/jni/android/graphics/Paint.cpp

core/jni/android/graphics/Path.cpp

core/jni/android/graphics/PathEffect.cpp

core/jni/android/graphics/PathMeasure.cpp

core/jni/android/graphics/PorterDuff.cpp

core/jni/android/graphics/Rasterizer.cpp