Handle EXIF orientation in hwui/ImageDecoder

Bug: 160984428
Test: AImageDecoderTest#testRespectOrientation
       ImageDecoderTest#testRespectOrientation
      Ieda439910ae52e609f0710d424503616d99ae5c7
      I23caef26b4c82173c758dd0ce7fb6f04e4154588
      I345a13d20776a007052d32e74fa42865b42f726d

It is possible to create an animated image with an exif orientation.
Using kRespect, there is no clean way to handle the orientation plus
compositing frames. Switch ImageDecoder to use kIgnore (the default).

Depends on a change in Skia (https://review.skia.org/344762) to make
SkAnimatedImage handle the orientation even with kIgnore.

Change-Id: Ib93b0ced09fa3cca4a6681745406355c48158fae