Code style fixes to ApiBase::requireAtLeastOneParameter

Fixes to patch that introduced ApiBase::requireAtLeastOneParameter.
Includes line breaks, code formatting, and documentation fixes.

Change-Id: I1a2faebf7cc9a2126def66d8a4ce64dbfa84059b
Follows-Up: Iae6649ed503fdbf14 (5e7a9c6f8e66de344e)
Merge "Code style fixes to ApiBase::requireAtLeastOneParameter"