AutoSize TextView (part 3) - define who supports autosize

Introduces a new protected hidden method that
specifies if the TextView (or descendant) widget
supports the autosize feature. All direct children of
TextView (besides EditText) support it.

Bug: 33098425
Bug: 32221168
Test: attached in the topic

Change-Id: I6f0092b4c9948afb427fe597b0515a39b1f258f6