Close any open widget resize frames when changing pages.

When a widget is added while talkback is enabled, the widget resize
frame does not automatically close when subsequently changing workspace
pages. This is because touch events which usually would cause the
widget resize frame to close, get intercepted by talkback before they
get to the resize frame.

Bug: 374044529
Test: manual - activate talkback, add new widget, and change page
Flag: EXEMPT bug fix
Change-Id: I2b8db22fa237a188c6705e9c6e57b12c1a7cd2f6