Revert "Officially deprecate skin autodiscovery"

The warnings interfere with Jenkins and stop code from being merged
where Jenkins is voting. See bug 66429 - we'll need to fix this before
merging this. Sorry!

This reverts commit 7fe6e4422467fa0c701f3ffb395e66de9cd0d67f.

Bug: 66429
Change-Id: I649462b0ccc22954ba4fbad8087dd55a7ad910bd
Merge "Revert "Officially deprecate skin autodiscovery""