Merge "Enable Checkstyle preupload hook for certain frameworks/base directories."

[Hook Scripts]

checkstyle_hook = ../../development/tools/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}

                  -fw core/java/android/animation/

                      core/java/android/text/

                      core/java/android/view/

                      core/java/android/transition/

                      core/java/android/widget/