Move launched activity info getter to ActivityClientController

- Add getLaunchedFromUid and getLaunchedFromPackage into Activity
  because they are used in several places.
- Move getActivityClassForToken to ActivityTaskManagerInternal#
  getActivityName because it is only used in system server.
- Remove getPackageForToken because it is no longer used.

Bug: 174041144
Bug: 174040691
Test: CtsWindowManagerDeviceTestCases

Change-Id: Iac1581ac2271baf1ab1625ced6cc1f42bf05eaf5