Merge "MTP: Add thumbnail generation for JPG" am: 5aac2c84ba am: d68b21d215 am: fe8e0b235f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1657579

Change-Id: Ia6f614fe65c560681b2f076046a7e4295a3f3e86