[Bundle] Add GetItem<T>(), TryGetItem(), Is<T>(), Contains()

[Bundle] Add GetItem<T>(), TryGetItem(), Is<T>(), Contains()

- Added internal constructor for other modules to use.
- Common Tizen errors have been added to the Tizen.Internals
  namespace. Hence, these errors are now checked for here.
- Common Tizen errors have been equated to Bundle errors in a
  private enum.

Signed-off-by: Sidharth Gupta <sid92.gupta@samsung.com>
Change-Id: Icb91b3590825dd0c6900a128b7c75f0e6faf120e