Remove unnecessary qualifiers from InputConnection

Otherwise, Checkstyle keeps nagging us whenever we touch lines around
them.

This CL also re-formats the license header and keep all the lines
within 100 colmun just to make Checkstyle happy.

This is purely a no-op style change. There must be no behavior change.

Test: prebuilts/checkstyle/checkstyle.py -f frameworks/base/core/java/android/view/inputmethod/InputConnection.java
Change-Id: Ie0f43f545d8056884c5d20a601d0a501187062c7