Fix smart selection logging bugs.

- Fix count with selection start index inside a word
- Properly handle whitespace characters
- Set the model version tag

Bug: 64914512
Test: bit FrameworksCoreTests:android.widget.TextViewActivityTest
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: Manually tested that logs are correct. Will follow up with automated tests.
Change-Id: Ib73b52ebce999f2cb6e5734e556cd09e47c89a29