WebView permission change

As requested by API council, the following were changed
- Changed the PermissionRequest to abstract.
- Used String for resources instead of long.
- Also remove the WebView.preauthorizePermission() which we didn't think

BUG: 15432556
Change-Id: I900a98b4e0288d2bcd8faf0bbcd84970600548a5
5 files changed