Remove extra mCropView.setExtraPadding

The extra padding is set (correctly) two lines above, then the wrong
value was put in.

Repro steps:
- Take a long screenshot where the height of the content is less than
  the height of the screen (I used split screen to make this easier)
- Observe whether the crop UI properly aligns to the image (see bug).

Fix originally from Sony:
https://android-review.git.corp.google.com/c/platform/frameworks/base/+/2401040

Bug: 266728115
Test: Manual steps described above.
Change-Id: I87c800dbb9fbfd7d15b220dea925aa7b3d4744c8