Change enter phone number layout for Smart forwarding

User cannot see the CANCEL and PROCESS buttons without scrolling up.
Because the screen uses a layout((collapsing_toolbar_content_layout.xml)
that allows the toolbar to be collapsed by upward scrolling. When the
toolbar is expanded, the content_frame below the toolbar is extended by
the height of the toolbar. However, the content below the toolbar
occupies the full height of the view and is laid out to place buttons
at the bottom of the screen. As a result, the buttons located at the
bottom cannot be seen without scrolling, so user needs to scroll down to
see them.

Test: Manual
Bug: 275681791
Flag: EXEMPT refactor

Change-Id: I90d25713edc371f3b9c47758bf162757f5c3c237