Fix lint errors around import lines in IInputConnectionWrapper

This is a mechanical code clean-up. No behavior change is expected.

Bug: 113177698
Test: Run the following command to confirm that there remains no lint
      error regarding import lines:
  prebuilts/checkstyle/checkstyle.py -f \
  frameworks/base/core/java/com/android/internal/view/IInputConnectionWrapper.java
Change-Id: Ife60e0b4234b5c8bc2d4d192b33dc97b156ea7fc