Fix owner files in text components in the widget directory

Text team owns the text related module in widget.
The previous per-file line was not working due to extra spaces between
files list.
Fixed by removing white spaces and also change to refer the text team
OWNERS file.

Bug: 234759754
Test: N/A

Change-Id: I3302de8fd90a12e7745f15d07c8c53c900bb3a14