Rename "tba" to "editorInfo"

This is a follow up CL to my previous CL [1], which aimed to clean up
all of the remaining historical terminology "attribute" or
"TextBoxAttribute" around "EditorInfo".

There remained several variables named "tba" in InputMethodManager,
which came from "TextBoxAttribue".

Let's also clean them up.

This is just a mechanical clean-up.  There should be no behavior
change and compability concern.

 [1]: Idd147940c34ab5fd39b2d11b2acb1554c7d8f26d
      d4bff906

Bug: 237008479
Test: presubmit
Change-Id: Iefb2545e31c66ad56469ef0260d26a6283ffcb16