change example title style to sentence-style caps

In the API reference pages and the API dev guides,
change the example titles to sentence-style caps
per agreement by docs team. Also change the
introductory sentences to the parameters
tables to use lower-case method names.

Closes-Bug: #1292685

Change-Id: I7fa6061864df6daf417c98899d92944ef4ed10d3
author: diane fleming
Merge "change example title style to sentence-style caps"