Remove requestFocus element in contacts drawer layout

In some cases the element was causing focus to jump unnecessarily
back to the toolbar when the main list content changed
See I228262dc02a773d113d22c3ada1393a81bf4a60c

Test
manually verify that title is announced when app is opened with
talkback enabled

Change-Id: I9fe60dad63fee7c0328d8afeb752b3200b98b2c6