Bugfix where the widget handles appear even when you can't resize it.

To fix it I added the following logic condition: if the minimum size of
the widget (`mMinVSpan` vertically) is equal to the maximum size of the
widget (`mMaxVSpan` vertically), then you can't change the size and the
handles shouldn't appear, I did this for both the horizontal handles as
well as the vertical handles.

Fix: 202004006
Change-Id: Ide05231f5712a736129ac6cb2fee358f7c70e371
Test: Manully veryfied.