Enable Checkstyle for "repo upload" for more projects.

This CL enables Checkstyle for the following directories:
- core/java/android/
- core/tests/coretests/src/android/

Bug: 34746646
Test: None
Change-Id: Ib8b3f198000be19e9a7a61aa5abd61d827454eba

PREUPLOAD.cfg

@@ -1,14 +1,7 @@
 [Hook Scripts]
 checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
-                  -fw core/java/android/animation/
-                      core/java/android/hardware/usb/
-                      core/java/android/print/
-                      core/java/android/printservice/
-                      core/java/android/text/
-                      core/java/android/transition/
-                      core/java/android/view/
-                      core/java/android/widget/
-                      core/tests/coretests/src/android/print/
+                  -fw core/java/android/
+                      core/tests/coretests/src/android/
                       packages/PrintRecommendationService/
                       packages/PrintSpooler/
                       services/print/