Mechanically apply TypedXml refaster template.

This is a purely mechanical CL that applies the output of the
recently added refaster templates to help guide towards more
efficient TypedXml methods.  There is no behavior change.

Bug: 171832118
Test: manual
Exempt-From-Owner-Approval: trivial refactoring
Change-Id: Ib79d5c7720f67a21c38e151ea58dddebdc7cb32f