Update tapl widget header click to be more accurate to help with flakiness

Bug: 422814320
Bug: 428201604
Bug: 428204850
Test: atest NexusLauncherTests:com.android.launcher3.widget.TaplAddWidgetTest
Flag: com.android.launcher3.enable_widget_picker_refactor
Change-Id: I74ecd95a169d0da39806878f04cc5d42966b1bf8
1 file changed