Move PermissionEvent classes out of v33

Since PermissionChange classes will be used on R devices as part of not
revoking permissions when they've changed recently, all the related
classes need to be moved out of the v33 directory so they can count for
coverage.

Bug: 205642821
Test: atest AutoRevokeTest
Change-Id: Ie9bbc7d03c8f6057d55931a58041bbd27d2a6587