fix(non linear font scaling): fix QQS clock text right padding may not proper...

fix(non linear font scaling): fix QQS clock text right padding may not proper when font sclaing changed

After increasing the font size and resetting to normal, the clock text in QQS has too much right padding. The reason is the clock cached wid
th are not reset so it would keep using the width that cached for large font size. Therefore, we reset the cached width when font scaling changed so that it would be updated when next onMeasure for clock view.

Bug: 282111042
Test: manually - video attached in bug
Change-Id: If1a0855e8676435721913d714b4fa584ef9377e6