[Safety Labels] Update preference click to navigate to App Permission

page instead of just settings gear click

* Also fix styling issue where undesired divider is seen between
  preferences

Bug: 269335292
Bug: 269531669
Test: atest CtsPermission3TestCases:AppDataSharingUpdatesTest
Change-Id: Ifa9193fb7cec588c1d7eb70f903c6e1583908da5