FloatingActionMode.setOutsideTouchable

Make floating toolbar outside-touchable for link action mode in
non-selectable TextView.
This allows the user to be able to dismiss the toolbar by tapping
outside of the toolbar.

Bug: 78099871
Bug: 73156794
Bug: 78298142
Test: bit FrameworksCoreTests:android.widget.TextViewActivityTest
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: bit CtsViewTestCases:android.view.cts.ActionModeTest
Change-Id: I8e3b460d0b1baee48d4f9cb3f92e73926eeee231