Revert "Add "Touchscreen" app to properly setup touchscreen calibration"

This reverts commit 19f71681a460a1335c631fd2d096d90a42bfaa2b.

This is no longer needed since ro.sf.hwrotation has been merged in
frameworks/native based on
https://android-review.googlesource.com/c/platform/frameworks/native/+/671042
5 files changed