This commit is an incremental improvement to the LoWPAN support API.
Bug: b/33073713
Test: Successfully ran unit tests from Ib3750be5052bf1a90bf871756e9121b047d3871f
Change-Id: I7ca6374b6a7135411eadf631bd7d84d7dc008203
This commit fixes some build problems that weren't noticed by Tree
Hugger. It also addresses some formatting issues, as well as
corrects a few issues noticed from the last review.
Change-Id: Icab67ba2c40bc02968e3f8ed2da5a4a3be6cf77f