Improved padding code comments in View.java

This was done in preparation for making changes related to
@UnsupportedAppUsage while trying to understand the semantics
of certain fields and the methods that use or modify them.

Bug: 123768420
Bug: 123768921
Test: No code changes.

Change-Id: I449be366906100c385ee610ce33953ddf0fb4ef0
1 file changed