Restrict reflection access to View methods

Restricted reflection access to:
- dispatchAttachedToWindow
- dispatchDetachedFromWindow

Those should not be used directly as it violates internal code
guarantees. Instead Views need to be actually attached to the window.

Bug: 123769352, 123769370
Test: n/a

Change-Id: I0006bc99a2d10747e931e944caee21932c4642dd