after discuss with Shuan & Peggy, we will make the chat view is not clickable since accessibility service is enabled for talkback, switch access and voice access, since some gestures are conflict with our design (double click to show all contents is conflict with a11y behavior) Bug: 187814675 Test: make SettingsRoboTests Change-Id: I7eecafc42cf4b4a0374ab46f07461e77907fc03a