Added the icon displayed on no account in search bar

Mofidied the search_bar layout and added this icon in the right side of the search_bar.
Added the hasAccount api in AvatarViewMixin and display this icon when there is no any account in device.
Added the test case of the AvatarViewMixin.

Bug: 117509285
Test: robotest
Change-Id: I6ceaa457af4fb20acd0211ca840df5b530c47e0f